catamaran design software

Top 8 Best Boat Design Software in 2024 (Free & Paid)

Written by: 3DSourced

January 16, 2024

Whether you’re a student, a hobbyist, or a professional, finding the right software is the key first step to designing a boat. However, with such a wide range of programs available, you need to make sure you choose the best boat design software for you.

We usually talk about 3D software in relation to 3D printing, but 3D modeling techniques are used across many applications and industries, including boat design. In fact, 3D printing is becoming increasingly prevalent in the boat design industry, with one example being Tanaruz’s 3D printed boats .

Quick Overview

• Free!ship : Best Free Boat Design Software for Linux
• Sailcut CAD : Free Sailboat Design Software
• Bearboat SP : Free Boat Designer for Small Boats & Kayaks
• DELFTship : Intuitive Free Boat Design Tool with Professional Option
• Fusion 360 : Best Free Boat Design Software for Beginners & Mac
• SketchUp : Best Boat Design App for iPad
• Autoship : Best for Naval & Marine Architecture, Best for Windows
• Solidworks : Best for Aluminum Boat Design Software & Best for Yachts

In this guide, we review several 3D ship design software to help you do just that. We’ll take a close look at both free and professional options, so that you’ll be able to find a suitable program regardless of your budget and experience.

Read more: our feature story on 3D printed boats

Best Free Boat Design Software

1. freeship – best free boat design software for linux.

Completely free and open source 

Subdivision modeling to design any hull shape

Can export designs in a range of file formats

Can submit support and feature requests 

Positive reviews from users 

Can be tricky for novices to get used to 

Not available on Mac 

Unlike most of the boat building software on our list, Free!ship isn’t developed by a company, but rather by an individual called Marven with a desire to make boat design accessible to anyone.

Free!ship is a surface modeling program for designing ships and yachts, using subdivision surfaces modeling rather than NURBs, providing the freedom to design hulls of any shape. 

Available on Windows and Linux, you can get started with this free CAD software by automatically generating a basic boat structure to use as a template. You can then easily use the nodes on the structure, as well as a variety of tools like curve, split, collapse, and insert plane, to reshape the design to your liking.

You need to fill in certain parameters, such as:

• Boat length
• Beam length
• Longitudinal and vertical direction

Once you’ve done that, you can view your boat design in four different perspectives and every angle to help you finalize your structure.

Free!ship offers the option to fill out support requests, feature requests, and report bugs. However, bear in mind that design beginners may be better off with a professional free ship design software that has more support options and tutorials available, as you don’t get any training with Free!ship.

2. Sailcut CAD – Free Sailboat Design Software

Specialist sailboat design software 

Easy to use node editing

Supports a variety of sail designs

Export designs in different file types including DXF files

Not suitable for designing other boat types

If you’re looking for a free small boat design software specifically geared towards designing sails and sailboats, you can’t go wrong with Sailcut CAD .

This design and plotting software can be used to design the sail, hull, and rail of a boat, in addition to precisely computing panel development in flat sheets.

You can use it for a variety of different sail types, including wing sails, cross cut, twist foot cut, vertical cut, mitre cut, and radicul cut, so it’s a versatile tool that will suit virtually any sailboat designer.

The software provides a base design template that you can then edit and view in a variety of formats, including shaded, wireframe, and development. It provides control over all the key dimensions of your sailboat, such as boat length, gaff round, and seam width.

Sailcut provides documentation that explains how to use it for CAD as well as community mailing lists and a bug tracker where you can report issues.

3. Bearboat SP – Free Boat Designer for Small Boats & Kayaks 

Specialist kayak design software 

Simple to use 

Control all aspects of your design

Multiple view options

Advanced tools like wetting

Not suitable for larger boat designs

Dated interface 

Bearboat SP is a specialist kayak design software that can also be used to design other similar types of small boats.

People have been using Bearboat to design kayaks since 1998 – and it’s the most popular program for this specific type of boat design. 

It’s a fairly simple, no-frills software that makes it easy to get stuck straight in. You begin by filling in the core boat hull parameters, such as length, stability, and design deplacement, and then just click the ‘create’ button to generate your base kayak template. 

From there, you can go about making structural changes to aspects like shape seam, bow and stern seam height, and rockers parameters. You can also easily change dimensions using the nodes on the 2D wireframe design.

There are three viewing options – bird view, side view, and cross-section view – for inspecting your design from different perspectives, as well as options such as changing the color of the wireframe design for easier analysis. 

Advanced features include the ability to view the wetted surface and underwater area, and a drag spreadsheet that contains all the parameters of your boat design, making Bearboat SP a well-rounded boat design tool overall.

4. DELFTship – Intuitive Free Boat Design Tool with Professional Option

More up-to-date and intuitive than other free boat design software tools

Impressive model rendering

Professional license and extension options

Perform basic calculations to check buoyancy and other factors

Free version has limited features compared to paid version

DELFTship is another great free boat design software, and offers a somewhat more professional and up-to-date solution versus Sailcut and Free!ship, with more impressive renderings than other free programs.

This 3D hull form modeling program is very intuitive with a range of easy-to-use design features, including lots of nodes that make it simple to edit your base model just by dragging and dropping.

You can inspect your models from five different viewpoints and convert them to wireframes and other formats to better analyze structure. Features like the keel and rudder wizard make it simple to design additional components of your boat.

DELFTship provides an unlimited free version alongside a professional license that costs $160. You can also add on extensions and board stability analysis calculations upon request for additional fees.

Even without the paid license you can still use DELFTship free to perform basic hydrostatic calculations and resistance calculations to help improve the precision of your designs, making this one of the most impressive free boat design tools. 

5. Fusion 360 – Best Free Boat Design Software for Beginners & Mac

More beginner-friendly than other boat design software 

Lots of learning resources & tutorials

High quality, flexible 3D modeling tool

Impressive renderings

Available on Mac

Not a specialist boat hull design software

Unlike the other programs we’ve covered so far Fusion 360 is a general purpose 3D modeling software that’s not specifically made for boat designing. However, it’s still widely used in boat designing, and its more general nature has some advantages.

For starters, designing a boat is a fairly large and complex task, and the more specialist software like Free!ship and Bearboat SP are complex if you’re new to computer aided design. 

While Fusion 360 still has a learning curve, it’s one of the best designed, intuitive, and beginner-friendly 3D modeling software out there. On top of that, it has a huge range of learning resources and tutorials, great support, and a large user community, so it’s very popular among new designers.

In fact, there are a variety of YouTube videos and written tutorials showing how to use Fusion 360 for boat design and for different types of vessels, including yachts and canoes. These include videos showing how to design wooden boats , so it’s a good choice if you’re looking for a plywood boat design software.

Another benefit of Fusion 360 is that, unlike most naval architecture boat design software, it’s available on Mac. It even has iOS and Android apps that allow you to view designs and collaborate via your smartphone or tablet. 

Fusion 360 is also free for three years as long as you’re using it non-commercially.

Best Paid Boat Design Software 

6. sketchup – best boat design app for ipad.

• Price : $119 a year for the app (free online version available)

3D modeling iPad app

High quality renderings

Intuitive and beginner-friendly

Free online version available

Not specialized for boat design

SketchUp is another general purpose 3D software used for boat design. While it’s not one of the most widely used boat design programs, the reason it’s on our list is that it’s one of the few premier 3D CAD tools that has a fully-fledged mobile app for iPad.

While some programs like Fusion 360 have viewer apps, these don’t have the modeling tools of their desktop counterparts. However, with the SketchUp iPad app, you can enjoy advanced modeling on a tablet, and you can even get creative using an Apple Pencil stylus.

There are a variety of tutorials and videos showing how to design boats with SketchUp, and as a user-friendly software it’s a good option for beginners. SketchUp also boasts high quality renderings for producing 3D boat designs that you can easily share with anyone. 

While the SketchUp boat design app has a yearly fee, you can also use the software for free using the online-only version, or choose from a variety of desktop licenses that vary in terms of features and storage.

SketchUp also offers iPhone and Android apps, although these are more stripped back versions more suited to viewing and sharing designs on your mobile.

7. Autoship – Best for Naval & Marine Architecture, Best for Windows

• Price : upon quote 

Large software suite that covers the entire boat design pipeline

Used by professional boat manufacturers

Highly intuitive NURBs modeling

Comprehensive testing features and data management

Extensive training and support

Can be used to create load plans

Not available on Mac

Steep learning curve 

Autoship is a software suite designed for professional naval and marine architects that provides solutions for every aspect in the boat design process, from modeling to construction and load planning modules for more optimal loading.

In terms of design, Autoship software offers five different CAD/CAM solutions:

• Autoship Pro – a hull design and surface modeling program.
• Modelmaker – for creating 3D models of vessels and components.
• Autohydro Pro – for analyzing hydrostatics and stability of your models.
• Autoplate – a plate design, expansion, and management system.
• Autopower – for resistance and powering predictions.

So, you can create a package with any number of these programs based on your needs. The great thing about Autoship software is all the programs are fully integrated, so any changes made to your model integrate into each solution.

Autoship Pro is the primary design solution in this suite, with a vast array of advanced features for designing vessels. Based on NURBs modeling, the intuitive interface allows you to work in up to four views simultaneously with ten levels of zoom and unzoom for top precision.

Some of the impressive features of this vessel design software include extensive context menus to help speed up operations, the ability to color surfaces so it’s easy to pick out parts in complex designs, curvature displays for curves and surfaces, hydrostatic and resistance calculations, and strength assessment tools.

Overall, with its mix of powerful design, testing, and engineering features, Autoship is one of the most complete boat design software on the market.

8. Solidworks – Best for Aluminum Boat Design Software & Best for Yachts

• Price : upon quote

Solidworks is one of the most advanced 3D CAD/CAM software out there and is widely used across design and engineering industries, from automotive to aerospace as well as boat design. 

In fact, this software is used by a number of leading boat manufacturers. One such example is Kvichak Marine Industries, a Seattle-based maker of high quality aluminum vessels, including both passenger and industrial boats.

In this v i deo , the assistant chief engineer explains how Solidworks’ highly precise 3D modeling tools allow them to improve processes by spotting issues quicker and therefore improve efficiency, with the ability to inspect every element from the individual pipes within hulls to the connections within engines.

Solidworks’ extremely advanced and flexible modeling allows you to create any type of boat you like. There’s even an eBook that explains each step in designing a superyacht using Solidworks.

While this software is mostly used by professional companies, there are also numerous YouTube videos showing you how to design a boat with it, so it’s accessible to amateurs.

What is Boat Design Software?

A boat design software is a program used to sketch, plan, and model a boat in 3D. Popular boat design programs include Free!ship, Solidworks, Fusion 360, and Autoship.

What is naval architecture?

Naval architecture is the processing of designing and engineering marine vessels like ships and boats, as well as their parts. Naval architects also work in boat and ship repair. 

Do I need special software for designing boats?

You don’t need a special boat design software to design boats and ships. While there are a number of specialist boat design software tools out there, general 3D modeling CAD programs like Fusion 360 and AutoCAD are also used for this purpose. 

What Can You Do With Boat Software? 

All boat software have different features that determine what you can do with them. For example, certain programs are designed for creating certain types of boats, such as kayaks and sailboats, so this is the first consideration you need to make to find a suitable program.

More expensive programs typically offer a much wider range of features than paid versions. At the top end are industrial solutions like Autoship and Solidworks, which offer extremely high quality and flexible modeling tools and provide support for testing, manufacturing, and engineering processes, so they’re complete solutions. 

There are also software like DELFTship and Fusion 360 that provide both free and paid versions, so you can try out the free versions and then upgrade if you want the extra features available on the paid licenses.

Buying Guide – Things to consider when choosing boat software

Type of Boat

Boats come in all different shapes and sizes, and some software are specially built for designing certain types of boats. For example, Bearboat SP is primarily geared towards kayak designing, while Sailcut is for sailboats. 

On the other hand, general 3D modeling software like Fusion 360 and Solidworks are more flexible, so you could use it as a Yacht design software and for other types of boats. The benefits of this are the increased flexibility and beginner-friendliness, but these general programs can lack some of the more specialist features that the likes of Bearboat SP and Sailcut have.

Compatibility

The device you’re using is going to have an impact on what naval architecture software you use, as most programs only work on certain operating systems.

In fact, the majority of boat design software are only compatible with Windows. If you’re looking for a boat design software for Mac, Linux, or iPad, you may be best off using a more general purpose 3D modeling software like Fusion 360 or SketchUp.

3D Rendering & Graphic Quality

Free programs like Free!ship, Sailcut, and Bearboat SP are all great for creating precise boat designs at no expense, but in terms of graphics and 3D model rendering, they’re all very basic. 

This isn’t unusual when it comes to free programs, and if you’re not bothered about graphics then it’s no issue. However, if you do want to create higher quality models and renderings – which is especially important if you’re a student or aspiring professional boat designer – then you’ll need a program that provides this, such as Solidworks or Autoship.

Usability & Training

Boat design isn’t exactly a simple process, so if you’re a complete beginner, you’ll want a software that’s easier to get to grips with. 

The free boat design software we’ve covered are all fairly simple to use, but the level of intuitiveness and support varies. If you’re a complete newbie to computer design, you may want to go for a widely used modeling software like SketchUp or Fusion 360, both of which boast great support, large communities, and more tutorials than specialist boat structural design software.

Budget & Free Trial 

The price of boat design software can vary a lot, from free programs to expensive professional solutions like Solidworks and Autoship that can cost thousands, so bear this in mind. Many paid boat design software offer free trials, so you should definitely take advantage of this to try a program out.

What software is best for basic boat design?

Free!ship, Delftship, and Sailcut are all popular free software that allow you to create basic boat designs. 

How do you design a yacht?

If you want to design yachts, the first step is to find a high quality yacht designing software such as Solidworks or Autoship.

How do you become a boat architect / ship designer?

To be a boat architect or ship designer you need to first obtain a relevant degree, such as a BEng or MEng in naval architecture.

How much do yacht architects make?

Yacht and naval architects can make anywhere from $60,000 to $150,000 depending on their experience and position, with the average salary around $75,000.

Autoship, Solidworks, Maxsurf, and OrcaFlex are all popular marine design software that are used in professional ship design.

To become a boat designer you first need a degree in a relevant subject, such as naval architecture, ship science, or marine technology. 

The best way to learn how to make a boat hull in Solidworks is by watching one the boast hull design tutorial provided by Solidworks Product Manager Mark Biasotti.

The first step to designing a yacht is finding a suitable CAD software, such as Solidworks or Fusion 360.

Lightning CAD Dock Designer is one of the most popular boat dock design software.

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Maxsurf Users Worldwide. We proudly confirm that Maxsurf is used in all leading Naval Architecture Universities around the world. For Academic use see https://maxsurf.net/no-cost-maxsurf-academic Thousands of International Maxsurf Users can testify to it’s effectiveness for all types of design. They include many more than are shown below: Please click here to contact us for more […]

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MAXSURF Users Worldwide continue to win awards Sarissa received the awards for: Best Naval Architecture Best Exterior DesignEco AwardInnovation of the YearBest Interior Design Sarissa is the first yacht to have received such extensive recognition at these prestigious awards. The MMYD studio is extremely proud to have been acknowledged in this way, amongst celebrated peers and industry friends.Malcolm […]

Intact and Damage Stability Analysis Or click here to contact us for more details. fast, graphical and interactive calculation of intact and damaged stability and strength for all types of Maxsurf designs. stability criteria allow statutory compliance to be determined. Interactive tools and immediate graphical feedback facilitate compartment and tank layout planning and load case […]

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Integrated Naval Architecture Software               for all Types of Vessels

Maxsurf Naval Architecture Software provides integrated tools for hull modelling and optimisation, comprehensive stability, motions & resistance prediction, structural modelling, structural analysis, and export to vessel detailing.

What vessels are designed using Maxsurf Naval Architecture Software?

Maxsurf is typically used to design:

Workboats: general purpose, dive boats, tugs, barges, fire boats, etc.

Fast Ferries:  Monohull, catamaran, trimaran, notable examples from Austal, Incat Crowther, Southerly Designs, One2Three, Damen..

Patrol:  Patrol and Coastguard vessels, Border protection, Fisheries protection, etc

Defense: Anzac frigate, Littoral Combatant, etc

Offshore: Supply vessels, Heavy lift etc, Windfarm maintenance/support

Yachts: Motor luxury yachts, Sailing yachts, production yachts, personal leisure craft (kayaks, sailboards, surfboards, etc), America’s cup sailing yachts,

Ships: VLCC, plate modelling on larger vessels, Container ships, General cargo, Dredgers

Ensure hull fairness and suitability for construction Modeler is focused on providing the best hull modelling tools – it is not a generic NURBS surface modeler. This helps ensure that vessels are fair and suitable for construction. Some other modelling tools hide the detail – they look fine on a 28” screen but are not smooth and fair at full scale. Modeler has a wide range of naval-architecture specific tools: sectional area curve, parametric transformation, upright hydrostatics, export to naval-architecture-specific 3rd party software etc. Improve design with accurate performance prediction Maxsurf has a range of efficient and accurate performance prediction tools: Resistance , sailing velocity prediction , ship response to waves Verify compliance with stability regulations Compliance with statutory stability requirements can be verified with Stability . A full range of GZ-based stability criteria can be evaluated. Most common codes are included but full customised user-criteria may also be added. Optimize vessel design for competing requirements Maxsurf’s range of tools enables naval architects to explore design alternatives quickly, be this manually or using 3rd party formal optimization tools. Maxsurf’s automation interface allows users to automate design evaluation from other tools such as Microsoft Excel, Friendship Systems CASES, etc. Collaborate with others and exchange data without errors Maxsurf uses a common design file system which is easily transferred to other users or incorporated into a document management / version control system such as ProjectWise. Bentley’s CONNECT capabilities further enhance collaboration. In addition, the parametric nature of the vessel design (for example tank and compartment definition in Stability or structural element definition in Structure) allows for concurrent design: Once the general design of the hullform and main dimensions are fixed in Modeler, tanks/compartments/structure can all be defined and then easily updated (simply recalculate the components) whilst the final hull fairing is taking place. Easy to learn and master, with intuitive user interface All the applications in Maxsurf have a standard Microsoft Windows user interface with a similar look and feel across all the applications, which makes them easy to learn and use, and easy to pick-up if used infrequently.

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Catamaran Hull Design

• Post author By Rick
• Post date June 29, 2010
• 2 Comments on Catamaran Hull Design

Part 1: Notes from Richard Woods

Since the America’s Cup experimented with going multihull, there’s been a lot of interest in catamaran performance and the catamaran hull designs that define performance. Many guys are investigating whether to buy a catamaran or design and build their dream boat. Let it be said here that building a large catamaran is not for the faint of heart. People begin building 100s of boats a year, yet few are ever completed, as life always seems to have a way of interfering with a good boat build. 

Never the less, since the rest of this website is about selecting and buying a boat , it only seems fair to have at least one webpage that covers catamaran design. This page contains notes on boat hull design goals and an accompanying page from Terho Halme has mathematical formulas used in actual catamaran hull design. It has become a popular research stop and an important reference to the catamaran design community.

The content of this page was reproduced from the maestro of Catamaran designs, renown British naval architect, Richard Woods, who not only designs catamarans, he sails them across oceans…. repeatedly. He has a lot to say on the subject of catamaran hull design.

“…When it’ all said and done, the performance of a sailing catamaran is dependent on three primary specs: length, sail area and weight. If the boat is longer it generally means it’ a faster boat. If she has more sail area, it means she’ a faster boat and if she’ light it means she’ a faster boat.  Of course, there are limits: Too much sail area capsizes the boat in brisk winds. If the boat is designed too light, she will not take any kind of punishment. Too slim a hull design and the boat becomes a large Hobie Cat capable of only carrying your lunch. Of course, too long and large and you’d have to be Bill Gates to afford one. Then there are lot of additional and very important factors like underwater hull shape, aspect ratios of boards and sails, wet deck clearance, rotating or fixed rigging and so on….” Richard Woods

All Catamarans are not equal, but all sailboats have two things in common: They travel on water and they’re wind powered, so the Catamaran design equations in the 2nd part should apply to every catamaran from a heavy cruising Cat to a true ocean racer.

Richard Wood’s comments on catamaran design:

We all know that multihulls can be made faster by making them longer or lighter or by adding more sail. Those factors are the most important and why they are used as the basis of most rating rules. However using just those figures is a bit like determining a cars performance just by its hp and curbside weight. It would also imply that a Tornado would sail as fast forwards as backwards (OK, I know I just wrote that a Catalac went faster backwards than forwards)

So what next?? Weight and length can be combined into the Slenderness Ratio (SLR). But since most multihulls have similar Depth/WL beam ratios you can pretty much say the SLR equates to the LWL/BWL ratio. Typically this will be 8-10:1 for a slow cruising catamaran (or the main hull of most trimarans), 12-14:1 for a performance cruiser and 20:1 for an extreme racer.

So by and large faster boats have finer hulls. But the wetted surface area (WSA) increases proportionately as fineness increases (for a given displacement the half orange shape gives the least WSA) so fine hulls tend to be slower in low wind speeds.

The most important catamaran design hull shape factor, is the Prismatic Coefficient (Cp). This is a measure of the fullness of the ends of the hull. Instinctively you might think that fine ends would be faster as they would “cut through the water better”. But in fact you want a high Cp for high speeds. However everything is interrelated. If you have fine hulls you can use a lower Cp. Most monohulls have a Cp of 0.55- 0.57. And that is about right for displacement speeds.

However the key to Catamaran design is you need a higher Cp if you want to sail fast. So a multihull should be at least 0.61 and a heavy displacement multihull a bit higher still. It is difficult to get much over 0.67 without a very distorted hull shape or one with excessive WSA. So all multihulls should have a Cp between 0.61 and 0.65. None of this is very special or new. It has been well known by naval architects for at least 50 years.

There are various ways of achieving a high Cp. You could fit bulb bows (as Lock Crowther did). Note this bow is a bit different from those seen on ships (which work at very specific hull speeds – which are very low for their LOA). But one problem with them is that these tend to slam in a seaway. 

Another way is to have a very wide planing aft section. But that can increase WSA and leads to other problems I’ll mention in a minute. Finally you can flatten out the hull rocker (the keel shape seen from the side) and add a bustle aft. That is the approach I use, in part because that adds displacement aft, just where it is most needed.

I agree that a high Cp increases drag at low speeds. But at speeds over hull speed drag decreases dramatically on a high Cp boat relative to one with a low Cp. With the correct Cp drag can be reduced by over 10%. In other words you will go 10% faster (and that is a lot!) in the same wind and with the same sails as a boat with a unfavorable Cp. In light winds it is easy to overcome the extra drag because you have lots of stability and so can fly extra light weather sails.

The time you really need a high Cp boat is when beating to windward in a big sea. Then you don’t have the stability and really want to get to your destination fast. At least I do, I don’t mind slowly drifting along in a calm. But I hate “windward bashing”

But when you sail to windward the boat pitches. The sea isn’t like a test tank or a computer program. And here I agree with Evan. Immersed transoms will slow you down (that is why I use a narrower transom than most designers).

I also agree with Evan (and why not, he knows more about Volvo 60 design than nearly anyone else on the planet) in that I don’t think you should compare a catamaran hull to a monohull, even a racing one. Why chose a Volvo 60/Vendee boat with an immersed transom? Why not chose a 60ft Americas Cup boat with a narrow out of the water transom?? 

To be honest I haven’t use Michelet so cannot really comment. But I have tested model catamarans in a big test tank and I know how inaccurate tank test results can be. I cannot believe that a computer program will be better.

It would be easy to prove one way or the other though. A catamaran hull is much like a frigate hull (similar SLR, L/B ratios and Froude numbers) and there is plenty of data available for those. There is also a lot of data for the round bilge narrow non planing motorboats popular in the 1930’-50’s which again are similar to a single multihull hull.

One of the key findings I discovered with my tank test work was just how great the drag was due to wave interference between the hulls. Even a catamaran with a modern wide hull spacing had a drag increase of up to 20 % when compared to hulls at infinite spacing. One reason why just flying a hull is fast (the Cp increases when you do as well, which also helps). So you cannot just double the drag of a single hull and expect to get accurate results. And any speed prediction formula must include a windage factor if it is to give meaningful results.About 25 years ago we sailed two identical 24ft Striders next to each other. They were the same speed. Then we moved the crew of one boat to the bow. That boat IMMEDIATELY went ½ knot faster. That is why I now arrange the deck layout of my racing boats so that the crew can stay in front of the mast at all times, even when tacking or using the spinnaker.

I once raced against a bridge deck cabin catamaran whose skipper kept the 5 crew on the forward netting beam the whole race. He won.

Richard Woods of Woods Designs www.sailingcatamarans.com

• Tags Buying Advice , Catamaran Designers

Owner of a Catalac 8M and Catamaransite webmaster.

2 replies on “Catamaran Hull Design”

I totally agree with what you say. But Uli only talk sailing catamarans.

If only solar power. You need the very best. As limited watts. Hp.

The closer to 1-20 the better.

Closing the hulls to fit in cheaper marina berth. ?

You say not too close. But is that for sailing only.

Any comment is greatly appreciated

Kind regards Jeppe

Superb article

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50 Best Boat Design Software Tools

Table of Contents

As technology continues to progress, designers, architects, and engineers hailing from all different disciplines are reaping the benefits of 3D design and ultra-fast modeling. Long gone are the days of flubbed designs and mountains of draft paper abandoned in the trash can. Now, the best and brightest minds can take advantage of innovative software solutions that take much of the guesswork about everything from measurement to compliance out of the design process.

The marine engineering and naval architect communities, including those who design and build watercraft, make use of these tools to develop better, more functional designs compliant with industry regulations and current design principles. From designing marine propellers in accordance with best practices to complete vessel designs that meet ABYC standards , good design is crucial for earning yacht certification and ensuring the overall safety and optimal functionality of components and vessels.

While there are countless software applications to choose from, not all adequately serve the needs of marine engineers and naval architects. From CAD to CAM to marine propeller design , hull design, and everything in between, we’ve done the legwork to help you quickly compare solutions and choose the software that best meets your boat design needs. Below, we’ve highlighted 50 of the best boat design software tools available on the market today. Please note, the following software solutions are organized alphabetically and are not ranked or rated in any way. 

1. ActCAD™ @ACTcadSoftware

ActCAD™ markets itself as being a “best replacement” for traditional CAD software. It’s made to support the needs of a wide range of engineering and design projects, including boat and hull design. The software comes with a cost-effective perpetual license and is equipped with 2D drafting, 3D modeling, and rendering capabilities.

Key Features:

• API customization available
• Free technical support
• Used in 50+ countries

Cost:  Contact for pricing

2. Autodesk® 3ds Max @autodesk

Autodesk® 3ds Max offers a cutting-edge, professional solution to the modern boat, hull, and ship designing engineer. The software consists of 3D modeling and rendering capabilities which allow the most aesthetically-conscious users to formulate the 3D boat models made to stand in for their final visions. 3ds Max also includes a built-in workflow system for better organization and collaboration throughout the design process.

• Mesh and surface modeling for creation support
• Spline workflows for optimized geometry animation
• Data channel modifier included for better design leverage

Cost:  $1,545/year

3. Autodesk® Fusion 360 @autodesk

Yet another Autodesk®-branded offering is Fusion 360, an integrated CAD, CAM, and CAE software that is designed to “eliminate your disconnected product development process.” By unifying these three systems, Fusion 360 offers its users innovative capabilities such as 3D design and modeling, simulation, generative design, documentation, collaboration, and even manufacturing support. The software company also provides its helpful Learn & Support module for new users of all experience levels.

• Includes a range of sketching and modeling capabilities
• Manufacturing extension available
• Data management in the cloud
• $1,335/three years

4. Auto power

Auto power , a resistance and powering prediction program by Autoship, provides an advanced user interface made to optimize hull parameters within the designing and engineering processes. These specialized parameters are based on 12 expert-developed independent resistance and propulsion methods for displacement and semi-displacement, as well as hull and catamaran planning. As Auto power is an Autoship-developed and connected product, users reap the benefits of seamless data integration within the Autoship CAD/CAM suite.

• Windows® 10 compatible
• Methods based on empirical studies and theory
• Easy re-sizing and re-positioning for report graphics

5. Autoship CAD/CAM

The Autoship CAD/CAM promises to support users within the entirety of the design process, from “generating hull lines through to nesting of parts.” In addition to the aforementioned Auto power,  the software also touts the Auto ship and Auto hydro Pro programs, two tools which are made to support the designer from the brainstorming process all the way to their finishing touches. Auto hydro Pro even offers advanced hydrostatics and stability calculations within a cutting-edge float simulator application.

• The Autoship System was developed by naval architects
• Auto hydro  Pro allows users to test their design against various weather and sea conditions
• Software products can be grouped to fit custom packages

6. AVEVA Hull Structural Design™ @AVEVAGroup

AVEVA Hull Structural Design™ is billed as being a “word-leading software for record breaking vessels.” This heavy-duty software package is built to provide key rapid definition and analysis during the ever-complex hull structural design process. It also integrates seamlessly with a number of other AVEVA Marine applications, resulting in less input time and fewer mistakes.

• Allows for rapid creation of ship’s 3D model
• Design reuse features allow users to recycle old designs
• Includes alternative design assessment options

7. BaseLine Technology Marine Products

BaseLine Technology offers a wide range of marine engineering-related products designed to help build the strongest, most sound vessels possible. Its signature bundled packages are customizable and include classic CAD and modeling software such as Rhinoceros, Flamingo, and Penguin. BaseLine also provides a range of learning solutions for those just getting acquainted with these tools.

• Offers a range of tutorial suites
• Deep discounts on software bundles
• Deals for re-sellers

8. Bearboat Software

The Bearboat Software suite is specifically made for those tackling tough kayak (and kayak-adjacent) structural designs, making it one of the only kayak-specific programs available. Bearboat is a long-standing program that first hit the Internet over 20 years ago. Most recently, developers released Bearboat Pro, an optimized and updated version of the software that can handle Bearboat Classic designs, with the help of an application intermediary.

• ‘Visualize’ allows for 3D rendering, slices, and stability assessment
• Includes a special ‘wetted surfaces’ tool
• Includes a special ‘restore generic kayak’ tool for optimal customization

Cost:  FREE

9. Blender @blender_org

Popular open source 3D creation software, Blender, is an entirely FREE, donation-based tool that provides excellent support to all types of designers, particularly those working in the marine engineering industries. The software is made to support the entire 3D pipeline, including modeling, rigging, animation, simulation, rendering, compositing, and motion tracking capabilities.

• Built with a Python-controlled interface for easy customization
• Blender Cloud available for a nominal monthly fee
• UV sculpt mode allows for quick ‘grabbing,’ ‘pinching,’ and ‘smoothing’

10. BoatExpress

BoatExpress Version 1.0 is an entirely free software that supports the complete boat design process for sailboats and motorboats with a hard or soft bilge. Tools include key data production on hull and hydrostatic elements, multiple drawing canvas options, auto-generated drawing stations, and streamlined resistance force graphs.

• Comes with a drawing overlay capability
• Intuitive file functions and printing options
• Allows online access to all data

11. Bureau Veritas Marine & Offshore @BV_Marine

Bureau Veritas Marine & Offshore offers up a healthy sampling of software products based on its research that are designed to ensure structural efficacy, as well as compliance. Currently, the organization has a range of different programs available within six pertinent design and safety categories, including Structural Design and Rules Analysis, Seakeeping and Mooring Analysis, Stability Analysis, Propulsion and Shaft Alignment Analysis, and Low Sulphur Fuel Oil Analysis.

• Built and supported by marine industry engineers
• Updated to mirror latest in compliance
• Local technical teams are available worldwide for software help

12. CADMATIC Marine Software Solutions @CADMATICOy

The CADMATIC suite of marine design software gives engineers the tools they need to cut down on time both in the design and production processes for greater prefabrication and pre-outfitting of blocks. The company even claims that its software is currently the “fastest to implement on the market.” The highly-intricate product is made for those who design some of the most impressive vessels sailing today; it offers detailed design advice, diagrams, welding management tools, 3D viewers, electric design elements, and much more.

• Built-in information management and visualization tools
• Easy exchange of interfaces and file formats
• Follow App for limitless tracking, anywhere

13. CAESES® Ship Hull Design @CAESES

Modeling and CFD software-maker CAESES provides an integrated solution for naval architects in its Ship Hull Design program. In it, users are able to build and construct parametric ship models that boast the smartest shape control possible. The software is designed to let the user complete the three most key tasks: 1) creating a variable hull model, 2) connecting a CFD for streamlined studies, and 3) picking the most optimized hull shape possible.

• Co2 cost-saving guidance built-in
• Adapts to fit the needs of any type of vessel
• Intuitive hydrostatic calculation features

14. Carlson Design Hull Designer

Hull Designer by Carlson Design is a highly-interactive hull design program that features intuitive visuals and 3D features. In addition to boasting a sleek, user-friendly interface, the software provides all that a naval architect needs to construct a sound vessel including pattern creation, chine design advice, buoyancy and waterline length checks, and much more.

• Hand-plotting capabilities included
• Compatible for Windows users
• Includes output options directed to VRML 1.0, DXF, HPGL, or Carlson plotters

15. DELFTship

DELFTship by Delftship Maritime Software is a state-of-the-art program that has been designed from the ground up to fit the needs of today’s naval architects, all based on expert research conducted by TU Delft. DELFTship Free comes with a stunning display and produces fast 3D visuals, while DELFTship Professional takes it one step further by providing users with features like complex asymmetrical hull design support.

• Suite of customizable extensions available
• Syncs with DELFTload for advanced board stability calculations
• DELFTship Free: FREE
• DELFTship Professional: €150

16. DraftSight® @Dassault3DS

DraftSight® by Dassault Systemes is a CAD software that is built for a variety of different engineering, design, and architecture professionals, including naval architects. Its signature 2D and 3D capabilities allow users to take advantage of advanced drafting support, as well as cutting-edge modeling technologies for the most accurate output possible. DraftSight® comes in a range of different forms to meet diverse skill levels and budgets, including DraftSight Standard (2D), DraftSight Professional (2D), DraftSight Premium (3D), and DraftSight Enterprise and Enterprise Plus.

• Integrates with Dassault Systèmes and SOLIDWORKS ®  solutions
• 2019 update now available
• All updates comes equipped with familiar user interface for fast adoption
• DraftSight Standard: $99/year
• DraftSight Professional: $199/year
• DraftSight Premium: $499/year
• DraftSight Enterprise and Enterprise Plus: Contact for pricing

17. Fairway @promatechltd

Fairway by Promatech describes itself as being a “software for design, fairing, manipulation of ship hull forms and conversions of models.” Fairway promises to deliver simple, intuitive features that feel like hand-drafting – except the technology offers many more benefits than the pencil and paper. Included in these features are automatically-processed lines, full control over line geometry, and fast exportation of hull data.

• Allows users to start from scratch or continue with an existing design
• User-defined accuracy elements
• A range of automated fairing options included

18. FastShip

FastShip is a basic ship design solution for designing hulls, superstructures, appendages, and other marine structures. The software, which is designed by Proteus Engineering, has a mission of providing users the ability to create fair surfaces in an accurate, ultra-timely manner. Most any hull feature can be effectively integrated into an original design, including bossings, bulbous bows, twin skegs, chines/knuckles, broken sheerlines, and circular bilge turns.

• Surface intersection and trimming modules included
• Real-time curvature elements
• The Hull Library for simple design organization

19. FINE™/Marine @NumecaInt

FINE™/Marine by Numenca International has dubbed itself as “the leading CFO software for naval architects and marine engineers,” and for good reason: this solution has proven itself to be one of the fastest solvers available on the market today. In addition to its long list of competitive capabilities, this software recently released a RHINO plug-in, allowing users to export to the popular interface with ease.

• C-Wizard allows for automatic set-up
• Fully automated mesh generator
• Wide range of case studies and tutorials available on the Numenca International site

20. FreeCAD @FreeCADNews

As its name suggests, FreeCAD is an entirely free CAD system that is available for a convenient web download. In addition to boasting a good amount of the same features as the paid CAD competitors, FreeCAD also allows for 3D design-modeling that is as intuitive as it is precise, for production ready drawings. As a bonus, the system also adapts to a number of other file formats for seamless workflow integration.

• Windows, Mac, and Linux compatible
• Reads and writes to a number of file formats including STEP, IGES, STL, SVG, DXF, OBJ, IFC, DAE, and more
• Donation-based solution

21. Freeship Plus

This is a free solution that provides 3D hull design using hydrodynamics calculation tools. According to Softonic, Freeship Plus takes up far less space than others and is currently very popular in the naval architect and marine engineering communities of Canada, Germany, and France. Freeship Plus Version 3.13 is currently available for free download.

• Available in English, Spanish, and German
• User-friendly interface
• Available for Windows

22. Hullform

Hullform is the perfect fit for hobbyists and professionals alike who are working to design a structurally-sound, basic hull for ships and sailboats. The software allows users a fair amount of flexibility in terms of experimentation. The interface lets users go in and smooth out lines, edit angles, and adjust the lateral offset with ease. In addition to ships and sailboats, Hullform can also handle other boat designs, such as those made for catamarans.

• Free download
• Includes hydrographic accuracy modules

If you are on the lookout for a NURBS-based yacht modeling software, jSDN might be the right choice for you. The specialized software allows users to devise and customize any type of sailing yacht of their choice and works to include key elements such as the hull, spars, sails, and other appendages. jSDN is currently available for FREE download which a limited-time PRO version.

• Available for Apple OS X, Linux, and Windows XP/Vista
• Includes hydrostatic calculations features
• Full NURBS curve and surface editor

Cost: FREE with Pro version available (contact for pricing)

24. Leonardo Hull Software @RINA1861

RINA’s Leonardo Hull software uses the power of direct calculations to help guide boat designers and architects to develop the most sound drafts possible. The crystal-clear 3D components allow users to create specialized features for a range of modeling structures such as bulkheads, stools, and trunks. In addition to the structural support, Leonardo Hull also carries out FEM analysis.

• 2D and 3D analysis tools
• Specialized training available
• Supports planned maintenance management systems

25. MAAT Hydro

Sistre’s MAAT Hydro bills itself as being the “quickest access to professional hydrostatic.” As the claim suggests, MAAT Hydro is a cutting-edge hydrostatic solver that is designed to combine real-time analytics and high-level calculation utilities. Sistre offers a range of MAAT Hydro software solutions including MAAT Hydro Demo, MAAT Hydro +, MAAT Hydro ++, and the free MAAT Hydro Resources.

• Fully 3D hydrostatic calculator (MAAT Hydro +)
• Provides real-time hydrostatic simulation and weight management data
• Newly-updated for 2019

26. MAXSURF

MAXSURF provides a wide range of integrated naval architecture software solutions that are designed to fit the unique specifications of all types of vessels. Currently, the MAXSURF software suite offers a number of hard-hitting modules such as MAXSURF Modeller (Fitting, Resistance, and Motions included), MAXSURF Stability, and MAXSURF Structure for hull and appendage support.

• Made for workboats, ferries, patrol vessels, defense, offshore, and yachts
• Provides smooth data transfer with Microstation, Rhino, AutoCAD, ShipConstructor, SolidWorks, and Microsoft Office programs
• Easy workflow and collaboration features

27. MSC Software® @MSCSoftware

MSC Software® provides shipbuilding solutions and support for a large pool of marine engineers and naval architects, including recreational craft designers, tankers designers, and even those who design for defense and military purposes. The software is guided by its visual prototyping technology which takes into account fatigue testing, thermal performance, noise and vibration, and panel buckling, among many other things.

• Cargo unloading tools
• Includes underwater shock analysis
• Composite hull capabilities for marine engineers

28. MultiSurf/SurfaceWorks by AeroHydro

AeroHydro is a CAD-based design package that includes popular names such as MultiSurf and SurfaceWorks. This highly-customized offering is designed so that naval architects and marine engineers are more easily able to create the very freeform surface shapes that are so hard to achieve in generic CAD software. Recently, AeroHydro added its Hydro feature which is a sleek hydrostatics and intact stability program.

• Windows-based PC program
• CFD collaboration options
• Pattern-maker software, Flattener, available as an add-on

29. NAPA @NAPAofficial

NAPA is a hull form design and hydrodynamics software that provides both eco-efficiency and safety for today’s ever-changing sea conditions. The software sees architects and engineers through the early drafting phases, all the way to build. It offers both real 3D topological and interactive surface modeling, as well as real automated hull form optimization with quick design variation and optimization algorithms. It also interfaces with any CFD software and is customizable to fit a range of unique design processes.

• Tools for hull transformations and parametric modeling
• Includes integrated stability and hydrodynamic analysis
• Maneuvering module serves as a last-step compliance check

30. Nauticus Hull

Nauticus Hull is a hull design software that focuses on strength assessment for a large variety of ship structures. Once the design is complete, users are able to use the unique modules provided to check compliance, including IACS Common Structural Rules for bulk carriers and oil tankers (CSR BC & OT) and DNV GL Rules. Nauticus Hull also seamlessly integrates with Sesam GeniE for FE modeling, post-processing, and code check.

• Offers strength assessment, design, and verification
• Supports the latest version of CSR BC & OT for prescriptive and Finite Element Method calculations
• Integrates with other common ship modeling systems such as MSC Patran/Nastran, ANSYS, AVEVA Marine, NAPA Steel, etc.

31. NavCad @HydroCompInc

NavCad by HydroComp, Inc. is a premier software that focuses on the prediction and analysis of both vessel speed and power performance. The flexible software is used by ship and boat builders, but also naval architects, marine engineers, propulsion equipment manufacturers, and even hydrodynamicists and researchers. Unique features include bare-full resistance prediction, steady-state propulsion analysis, propeller selection advice, and much more.

• Includes vessel acceleration features
• New software-based security options (for 2018 update)
• Calculation of mass fuel rate module

32. Onshape @Onshape

Onshape is famous for being the one and only product development platform that merges the capabilities of CAD, data management, collaboration, and real-time analytics. Boat designers of all disciplines reap the benefits of Onshape’s CAD module which gives users the tools they need to create a sound vessel. Included in the CAD features are parametric modeling, simultaneous sheet metal tools, assemblies, drawings, and much more.

• Product data management module included
• Real-time design review with complete edit history
• Integrates with ERP, PLM, SSO, Simulation, and CAM
• Standard: $1,500 per user/year
• Professional: $2,100 per user/year
• Enterprise: $20,000 (contact for more details)

33. OpenSCAD @openscad

OpenSCAD is a free software that is designed for creating solid 3D CAD objects, complex vessels included. The specialized software operates on two modeling techniques – constructive solid geometry (CSG) and 2D line extrusion.  Unlike some of the sleeker, paid competitors, OpenSCAD focuses less on artistic rendering and more on the nitty-gritty details of the design for improved structural integrity and safety.

• Available for Linux/UNIX, MS Windows, and Mac OS X
• DXF file design parameter reading
• Donation-based software

34. Orca3D @Orca3D

Orca3D is the premier software for engineers and architects as it merges pertinent naval elements into the widely-used Rhino 3D environment. Orca 3D boats an easy-to-use, dual-module system that includes hull design and fairing and intact hydrostatics and stability (Level 1) and speed/power prediction and weight and cost training (level 2). Orca 3D also offers an add-on CFD package for better modeling and performance.

• Hull Assistants for instant hull creation
• Takes into stability parameters into account
• Extensive support included

Cost:  $1,390-$3,470 (depending upon license selected)

35. PolyCAD

PolyCAD allows its users to “create, manipulate, import and export geometry for yacht and ship yacht design.” The software provides a sensitive surface modeling capability that takes into account a number of important hull design features. This is supported through modules like Sections, Curves and Surfaces, Parametric Hull Generation, IntelliHull, and X-Topology Multi-Patch Surfaces. PolyCAD also includes extensive support on naval architecture and analysis, as well as hull surface geometry reconstruction.

• Supports a range of mouse movements
• Friendly user interface
• Lofting module for fair shape creation

36. Poseidon

Poseidon is an ultra-specialized hull design software that assesses the strength of custom ship hull structures. It contains a vast array of modeling functions and comprehensive analysis capabilities that are made to test the integrity of even the most complex designs. The software supports a full 3D modeling scope and special tools are included for hatch cover assessment.

• Low training requirements needed for use
• Features fully automatic determination of initial scantlings
• Includes all rule sets and ship types

37. PrimeShip @ClassNKEOD

PrimeShip is a software service that assesses the overall health of a ship throughout its entire lifecycle, starting from the design phase. Created by ClassNK, the PrimeShip suite includes a range of software options to fit a variety of needs including ship performance capability modules, rule calculation systems, bulk carrier classifications, and even a CAD interface. PrimeShip also offers software support once the vessel is built with its machinery, operation, maintenance, and environment modules.

• Web service portal access included
• Includes a range of rules calculation systems
• Add-on software for common structural rules available

38. ProBasic 3

ProBasic 3 by New Wave Systems, Inc. is an updated, more lightweight version of ProSurf 3, a classic hull design and analysis software. This low-priced, ultra-flexible software allows users to assess the most pertinent design and architectural data, including hydrostatics, stability, and resistance calculations. New Wave Systems, Inc. also offers other versions of the software with and without added capabilities for heightened customization.

• Allows user to define, fair, and loft any hull shape
• Produces plate layouts
• Uses 3-dimensional B-Spline (NURB) surfaces

Cost:  $195

39. PROLINES 2019

PROLINES 2019 is a program that is expecting a new release (PROLINES 8) in the latter half of 2019. The software includes a host of impressive features including 3D printing and rendering file capabilities, high-speed image rendering, and much more. This software is specifically written to meet the needs of Windows 10 users.

• Runs at vivid 4K resolution
• Plots 3D hidden surface plots
• Includes visual vertex layout editor

40. Rhino 3D @BobMcNeel

Rhino 3D is a groundbreaking and widely-used software that is famous for its rendering, animation, and NURB translation capabilities. It boasts 3D rendering tools so advanced that their qualities reach products 20-50x their price, and its legendary interface is simple enough for even the newest users to master. The Rhino 3D modeler is now available for Mac OS X.

• Allows the editing of curves from other objects
• Vast array of construction aids
• Easy annotation in drafting mode

Cost:  $695-995

41. SARC PIAS

PIAS, the professional ship design software from SARC, is a favorite of naval architects worldwide as it offers a range of highly-researched certified calculation methods for the most flawless, compliant designs possible. After making an initial purchase, users can rest easy knowing that SARC is hard at work making constant improvements to the software. Current modules cover hydrostatics, hull design, resistance and propulsion, and much more.

• Includes a range of export functions
• Damage stability features
• Compartment definition and application

SHAPE by MasterShip allows users to generate a 1:1 faired production model of hulls and superstructures. The software aids in the creation of 3D shapes, using the multi-surfaces principle to define and connect multiple surfaces. In terms of fairness support, SHAPE always provides precision so that even the most complex examples of curvature are displayed.

• Generates production data from the shape
• Stores the shape in an easily-accessible database
• Allows imports of 2D line plans and 3D shapes

43. Shape Maker©

Shape Maker© is an offering from Marine Software Integration (MSI) that is one of the most unique ship surface modeling solutions on the market today. It takes in virtually all lines and surfaces to aid in the seamless forming of hulls, superstructure, wheelhouses, masts, thrusters, anchor pockets, appendices, and more. The program also allows for the helpful import/export of DXF and IGES.

• Used for the initial design and throughout the production
• Trimmed surfaces support
• Includes import and realization results of CDF

44. SketchUp @SketchUp

SketchUp is an ultra-popular 3D design software that gives users the tools they need to achieve fast, flawless 3D designs on the web. Though the software is geared heavily towards building design theory, there are a number of 3D elements that make it suitable for marine engineers and naval architects designing vessels.

• Designs can be communicated in either 2D or 3D
• Auto-generate detailed reports
• Flexible modeling capabilities
• SketchUp Shop: $119/year
• SketchUp Pro: $299/year
• SketchUp Studio: $1,199/year

45. SOLIDWORKS @SOLIDWORKS

SOLIDWORKS by Dassault Systemes is a well-rounded 3D software tool that is built to manage designs throughout their entire life cycles. In addition to including many of the standard features of its competitors, SOLIDWORKS also boasts a simple interface for easy learning, as well as an active online community that promotes tips-sharing and education.

• New 3D texture tool
• Includes direct 3D markup tools
• Cutting-edge chamfer and fillet creation options

SPLASH is a specialized software program designed by South Bay Simulations, Inc. that focuses on tackling surface panel code, flow simulation, and performance prediction for all types of yachts and ships. In October 2019, South Bay Simulations, Inc. will release new versions of the software. Demo versions are available here .

• Includes fully-generated 3D capabilities
• Full heel and yaw, sink, and trim capabilities
• Includes a detailed output of model and flow data

47. TouchCAD

Those searching for a combined 3D modeling and unfolding CAD program need look no further than TouchCAD, a solution that generates complex 3D shapes for simple conversion. TouchCAD’s bread and butter is marine design, but it also works well for a range of other tasks, including sheet metal objects and others used in industrial and architectural design.

• Available for Mac OS X 10.6-10.3 and Windows 7/8/10
• Unfolds very high-resolution models
• Specifically made for the marine engineering industry

48. Tunnel Boat Design Program Software @aerom

AeroMarine Research’s Tunnel Boat Design Program Software (TBDP) is a PC-based program designed for performance analysis for all hulls, power catamarans, modified tunnels, and more. Users experience heightened fuel efficiency and a much more streamlined design process as opposed to simple drafting. The recently released TBDP Version 8 is now available.

• Utilizes signature AR analysis design approach
• Useful for any sized boat
• Powerful on-screen graphic presentation

49. Wolfson Unit Marine Design Software

Wolfson Unit supplies a wide range of marine design software to its diverse global client base. Currently, Wolfson Unit offers software focused on disciplines such as hydrostatics and stability, design, and resistance and propulsion. To sweeten the deal, the company also has free options and onboard programs available.

Key Features: 

• Power Prediction and Propeller Design programs
• HullScant, HullScant Rudder, and Ship Motions design
• HST Loading and HST Damage

50. ZW3D @ZWSOFT

ZW3D by ZWSOFT is an all-in-one CAD/CAM that is one of the most elaborate, yet cost-effective of its kind. Users report a great deal of time saved – 300% to be exact – as well as more stable and much faster modeling regeneration than the competitors. New for 2019, ZW3D boasts an upgraded translator that allows users to easily collaborate with the most popular file formats.

• Innovative mold design function
• Integrates easily with third-party tools

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How To Create the Perfect Cruising Catamaran Layout

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More than ever before, sailing fans are gaining an interest in catamaran layouts and designs that define performance. Many others are also looking into either buying a cruising catamaran or designing and building one. While building a catamaran is no piece of cake, this article shows you how to create the perfect cruising catamaran layout. 

To create the perfect catamaran layout, carefully consider factors like a good hull design, optimal helm station placement, boat stability, and adequate load-carrying capacity. Excellent galley positioning, ease of handling, and spacious living and sleeping quarters are also crucial. 

The modern cruising catamaran is a far cry from the simple Polynesian double canoe of old. That’s because structural innovations and new composite materials have resulted in multihulls with impressive cruising abilities. Keep reading to learn more about exceptional catamaran layouts.  

The Changing Trends in Catamaran Designs

The early cruising catamaran designs resulted in boats that could sail much faster than traditional sailing boats. In addition, they could glide with ease in shallow waters and required less wind and crew. Unfortunately, these cruising cats were heavy, had small, cramped interiors, and boasted somewhat challenging handling abilities. 

Today’s cruising catamarans are different. They boast the utmost comfort, high speeds, and the safety of a well-designed cruising yacht. They are also more exciting, visually appealing, deliver the smoothest of rides, and sport more spacious interiors. 

Have a look at the below video showcasing the top ten cruising catamarans:

Features To Look Out for in Catamaran Design Layouts

Cruising catamaran designers understand what most sailors look for in a cruising vessel. They, therefore, design cruising multihulls that address these pertinent issues and more. Some of the features you might want to consider having in your dream boat include the following:

• Responsive performance. Outstanding performance allows for pleasurable cruising and ensures your safety since you have more options during difficult weather.
• Excellent load-carrying ability . This allows you to have an extended cruising vacation or ocean crossing.
• Boat stability . Go for lightweight, robust construction, which results in a lot of buoyancy.
• A low center of gravity for smooth rides and enhanced performance. Centering weight around a low center of gravity improves the overall sailing quality, reduces pitching movement and reduces the risk of capsizing .
• Adequate bridgedeck clearance to reduce slamming and provide better performance in rough conditions. A high bridgedeck also means less noise and slapping action from the waves hitting the boat bottom, thus ensuring a quieter, smoother ride.
• Comfortable sailing. To enjoy a quality life on board, you need comfort while at sea. Thus, elements like gentle movement, no creaks or groans, no bridgedeck slamming, and minimal pitching are essential for quality, peaceful and restful sleep.  

Now that you know what a cutting-edge catamaran features, let’s look at how to create the perfect cruising catamaran layout.  

Build a Larger-Sized Catamaran

The early catamarans ranged between 36-42 feet (10.9-12.8m). At the time, this appeared to be a good size in terms of safety and ease of handling. However, the boats were heavy, and the additional drag and displacement adversely affected their performance and windward ability. 

It’s now possible to make the new generation catamarans lighter, larger, and more spacious with excellent power-to-weight features. The current trend is larger-sized catamarans in the 45-50 feet (13.7- 15.2) range. Composite engineering and technologically advanced equipment such as furling systems, electric winches, and autopilot make it easier for a smaller crew to sail larger boats with confidence. And to do so without compromising safety or stability. 

Get the Best Catamaran Hull Design

A cruising catamaran’s performance depends on three main aspects; its length, the sail area, and the boat’s weight. Long boats are generally fast. A light boat with more sail area is also faster than a heavier boat with less sail area. In other words, you can make a multihull faster by making it longer, lighter, or adding more sail.

However, there are exceptions to this rule; a boat with too much sail area is more likely to capsize if there are brisk winds. Also, if the boat’s design makes it too light, it’ll be unable to handle much punishment, while a hull design that’s too slim would make the vessel incapable of carrying any significant loads. But that’s not all; if the boat is too long or too large, it’ll become grossly exorbitant. Narrow hull shape might also mean smaller cabins.

Nonetheless, these three factors alone are not enough to determine a cruising catamaran’s performance. While faster boats boast finer hulls, the wetted surface area tends to increase as fineness increases; thus, fine hulls end up becoming less fast in low wind speeds. Also, very wide hulls mean a reduction in actual performance.

The Prismatic Coefficient (Cp), a measure of how full the ends of the hull get, is the most essential design hull shape factor for any catamaran. A high Cp equals high speeds, although you can still use a lower Cp if you have fine hulls. Nevertheless, the key to a good Catamaran design is a higher Cp for fast sailing. 

To achieve a high Cp, there are several things you can do: 

• Fit bulb bows . Unfortunately, the bulb bows tend to slam in a seaway when you do this.
• Have an extensive planning aft section . However, this can increase the wetted surface area, WSA and lead to additional challenges. 
• Flatten out the hull rocker and add a bustle aft. This helps to add displacement aft. 

Build Convertible Main Living Spaces

The open cockpit is now a thing of the past. Instead, pioneering designers for catamaran manufacturers like Nautitech, Gunboat, and Catana now replace traditional-style salons, cockpits, and cabins with spacious indoor and outdoor living spaces. The concept involves merging separate saloon and cockpit areas with duplicate lounge spaces and the use of hard-wearing composite materials. 

You can also design the cabin to suit your preferences. You may decide to add a cabin or remove one, add a bathroom, have the forward berth in the hull or on the wing deck.

• The design enhancements boost usable space while opening up the living areas.
• It reduces time and costs for interior maintenance and cleaning. 
• Large windows bring in more light, increasing visibility. 
• Luxurious, spacious, and airy owners’ cabins provide more comfortable living space. 

Bulkhead Helm Stations vs. Twin Stern Steering

Many catamaran owners have traditionally preferred bulkhead steering. This helm position remains popular, but twin stern steering positions come with more advantages since they provide greater sails visibility. The twin stern positions are also best suited for racing or day sailing since they often lack adequate protection for extended cruising. 

Exposed helms are not ideal for a long ocean passage. Go for a safe, secure, and well-protected helm station that provides good visibility and comfortable space for long watches. Again, it’s best to have all control lines at the helm to establish a static control station. Also, have all push-button-controlled winches, instruments, windlass, and autopilot prominently located inside the cockpit. 

• Twin stern steering positions give you a better view of the sails
• You get a better feel for overall sailing conditions.
• Twin stern steering positions lack the necessary protection for extended cruising. 

Go for the Flybridge Design

The flybridge design is appealing because it offers excellent visibility, more comfort, and additional entertainment and lounging space for everyone on board. Unfortunately for smaller boats – those below 50 feet (15.24m), there is minimal protection from the elements. As such, you might want to consider adding enclosures to offer protection. The flybridge, thus the helm, remains cut off from the vessel, which makes communicating with the crew a challenge. 

• It provides great visibility.
• It offers comfortable spacing. 
• It might be unsafe to move from the cockpit to the flybridge in bad weather.
• It isn’t easy to communicate with the crew.

Daggerboards vs. Fixed Keels

Average cruising catamarans typically utilize fixed keels while high-performance cats have daggerboards . Fixed keels allow you to beach your catamaran easily, and your hull remains intact if a collision occurs. While you lose some angle when sailing upwind, you gain more interior space in the hulls that you can put to good use.

Daggerboards are essential in a performance cruising catamaran since they guarantee that the boat delivers good upwind sailing, including during difficult situations. During long passages, they allow you to point better upwind though the drawback is that they consume much interior space within the cruising catamaran’s hulls.

Since flying on foils ( hydrofoils ) isn’t that practical on cruising catamarans, designers of larger-sized boats have also come up with modified daggerboards. These daggerboards produce lift and prevent leeway, too, thereby improving performance significantly, as seen with the Catana 59’s curved daggerboards. These foil-like daggerboards lift the boat ever so slightly upon reaching higher speeds, making it feel less heavy and much faster. 

At the end of the day, calculating the performance of a boat sailing in a wide range of varying seas and winds might not be easy – despite a daggerboard or fixed keel configuration. This is because upwind speed depends not only on the sails’ quality but also windage and the height of the bridgedeck beyond the water.

• The design innovations -curved daggerboards and hydrofoils- improve catamaran performance significantly.
• Daggerboards enable you to access otherwise inaccessible anchorages.
• Daggerboards take up hull space in the hulls of your vessel.

Galley Up vs. Galley Down

Galley layout are becoming more and more important as more people, including families, start sailing regularly. While at sea, your galley needs to be a safe place, well-ventilated, and functional. Everything should be well-thought-out for the sailor’s comfort, including handholds to make it safer to move around the boat. 

While the galley location can either be up the bridgedeck or down in the hull, galley up appears to be the most popular trend. This makes the galley the focal point of both the living space and entertainment areas.

If you have a family, this placement is ideal since you make your meals from the galley and get to spend most of your time here. Many cruising families and couples prefer this arrangement and find separating the galley down the hull unappealing. Besides, carrying hot food up and down the staircase is unsafe.

Still, galley down is ideal for charter boats since it offers a private cooking area and uses up hull space efficiently.  

• Having the galley on the bridgedeck is ideal for families and cruising couples.
• Placing the galley on a similar level with the serving area and cockpit is safer and less tiring.
• There’s better ventilation on the bridgedeck, making for comfortable cooking. 
• There’s less kitchen privacy galley up.
• On smaller catamarans, this layout can impact the size of the saloon seating area significantly.

Production Catamaran vs. Custom

The choice of either a production catamaran or a custom design might seem pretty straightforward. Production catamarans from major brands come backed by proven designs, dependable construction, solid warranties, and many years of experience. The catamarans are easy to service, source for parts, and most – particularly the owner’s versions – hold on to their value, making them much easier to resell. 

On their part, custom boats are fantastic in that you can tailor them to your exact needs. However, they might be more challenging to maintain or service. That’s because of parts unavailability and lack of construction knowledge.

Choose Quality Construction Materials

The best quality materials to use on your catamaran are both light and robust. While carbon fiber is great, plywood, plywood/epoxy, and strip-cedar are excellent materials too. What’s more, they are also affordable, so you don’t have to get too hung up on cutting-edge building materials. What matters is build quality; thus, a well-built plywood catamaran boat can last as long as a boat made from more high-tech materials. 

Combining various materials also helps combat some of the issues that plague plywood boats in terms of resale value. At times, the design tends to make the boats appear pretty dated.  

• Plywood and strip-cedar materials are affordable and provide excellent build quality. 
• Plywood boats may have a lower resale value than those built with modern materials.

Consider Ease of Handling

An important factor in handling a cruising catamaran is deck layout. Most cruising catamarans sailed short-handed , so if your boat has one helm, all lines should run back here to allow for a static control station for the entire boat. 

The other essential element is visibility from the helm. The 360 degrees of visibility while maneuvering, docking, or underway is crucial to your boat’s safety, as well as life and property. As such, you should be able to view both bows, or at least the pulpits and sterns, while standing at the helm. If not, you may have challenges handling the boat due to blind spots.

Consider the Load Carrying Capacity

A well-designed catamaran is enjoyable to sail in all weather conditions. It’s also much easier to handle than a monohull because of its widely spaced twin engines. But when you immerse extra hull depth, the vessel gets sluggish and moves slower, maneuvering in tight spots or when docking becomes more challenging. Furthermore, the hull submersion reduces bridge deck clearance, leading to hull slamming. 

To allow for adequate load carrying capacity, you need a design that provides a generous displacement. This helps to ensure that you maintain reasonable bridge deck clearance even when fully loaded. It also allows you to avoid digging big holes in the water as you drag your transoms. 

Displacement refers to the amount of buoyancy designed into the hulls, which essentially means that your boat will cruise better if its weight is less than your designed displacement.

Note that an overloaded catamaran not only loses out on performance but eventually, on safety too. To counter this, choose a lightweight catamaran with hulls bearing cored construction and interiors made of lightweight materials.  

Remember, when you go cruising, you will need to carry fuel, extra water, supplies, equipment, and amenities, translating into thousands of extra pounds. Therefore, try and avoid the following design errors to ensure that your catamaran has an adequate load-carrying capacity:

• Avoid putting in place too much accommodation space.
• Avoid building a heavy boat ‐ use low-tech construction materials.
• Avoid installing inboards in a small boat.
• Lightly constructed catamarans perform faster and carry more weight.
• Cored construction makes for a strong and stiff catamaran, thus enabling good performance.

Final Thoughts

A well-designed cruising catamaran is a joy to behold. Today’s modern technological advancements mean that you can buy or build a light but strong cruising catamaran. And as you can see from this article, there are many excellent cruising catamaran layouts that you can choose from. 

However, whichever layout you decide on needs to fit your sailing needs and purposes to ensure you remain comfortable and safe while at sea. Above all, ensure that you go for a vessel that you can handle with ease in all weather conditions.

Owner of CatamaranFreedom.com. A minimalist that has lived in a caravan in Sweden, 35ft Monohull in the Bahamas, and right now in his self-built Van. He just started the next adventure, to circumnavigate the world on a Catamaran!

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Ship Hull Design

Design ships with better flows! CAESES ® enables you to build robust parametric ship models with smarter shape control. It is the leading software solution for naval architects that are interested in CFD-based hull optimization – to create better flows around their designed vessels.

The focus of CAESES ® is on the underwater part of the ship: Create a variable hull model, connect your CFD and run studies. Finally pick an optimized hull shape that outperforms similar ships in the market.

Massively Save Costs and Resources

Why using CAESES ® ? Consider a 14.000 TEU container vessel that runs with IFO380 fuel: By optimizing the vessel’s hull form with CAESES ®   to gain a 4-5% improved efficiency, the ship operator can save more than 1.000.000$ of fuel costs – per year! At the same time, this helps saving our planet by massively reducing NO x , SO x and CO 2 emissions .

CAESES ® beneficiaries can save more than 1.000.000$ of fuel costs – pear year!

Create Smarter Variable Models from Scratch

So how to start with the vessel optimization? First, set up a smart variable geometry while at the same time you build-in all your design constraints (displacement, center of buoyancy, hard points etc.). Save time by only generating feasible designs – manually or fully automated by using the intuitive variant management system of CAESES ® .

Create efficient parametric models to investigate skeg variations

Any Type of Vessel

No matter which kinds of ship hull forms you need to design and optimize – CAESES ®  is a generalized hull modeler for any type of vessel!

CAESES allows you to design container vessels, yachts, tankers or even swath hull forms

Fast Optimization of Existing Ship Hulls

If your time frame is short and you have no time for creating a whole model, you can use the efficient Lackenby shift transformations and other deformation methods of CAESES ® . These transformations allow you to intuitively reshape your hull, again manually or automated in an optimization. Works with any imported geometry!

Asymmetric aft body studies: Fast variant generation using free form deformations in CAESES

Ship hull optimization: Fast deformation of an existing bulbous bow geometry

Hydrostatic Calculation

In an easy-to-use and intuitive way, CAESES ® provides you the most important hydrostatic quantities such as displacement and moments of inertia etc. These values can be calculated manually for a new design, or fully automated for a set of design candidates.

Optimization of ship geometries including hydrostatic calculations for each design

Leverage your Flow Analysis Tools

CAESES ® closely integrates with your CFD and CAE analysis tools – no matter which CAE package you use. There is also an add-on for the CFD code SHIPFLOW , the industry standard for shipbuilding. Connect typical analyses to your CAESES ® model such as ship hull hydrodynamics, wave resistance, and wake field analyses, involve motion analyses of vessels and platforms with seakeeping codes, as well as propeller performance with CFD.

Wake field side-by-side comparison of design candidates in CAESES

CAESES includes postprocessing capabilities e.g. for fast comparison of different design candidates

Automation of Pre-Processing

By means of feature definitions , CAESES ® gives you a flexible and powerful environment to automate anything, including tedious pre-processing tasks such as the creation of clean surface meshes. See the article “ CFD Flow Domain for Ship Hulls from NAPA IGES Files ” for an example. It describes the single-click solution for generating a closed flow domain from unclean NAPA IGES files.

Quick generation of a closed flow domain from imported IGES files

Template Models

As a new development (still in a beta phase), CAESES ® hull design setups can be fully wrapped into an easy-to-use interface, including meshing, CFD analysis and even optimization runs. Based on the tools that you use in your company. Just change the hull’s main dimensions and other project-specific key parameters and let CAESES ® do the number-crunching job of finding the optimal design candidate. Here is a short video that demonstrates how templates can be used from within a browser (see also the blog post about the SMM competition ).

Easy-to-use template models that include geometry generation, CFD and even optimization

Propeller Design

CAESES ® allows you to create any type of marine propeller blades. It generally focuses on the advanced design of highly customized and optimized propellers. Point data can be automatically imported and interpolated or parameterized, and complex Excel sheets can be accessed or even completely transferred to the CAESES ® environment. CAESES ® comes with a set of NACA profiles, but sections can also be defined by yourself using the CAESES ® feature programming language . There are also complete parametric propeller setups based on standard series (e.g. Wageningen – see this blog post ).

Wageningen propeller: click on it to start a short demo video

CAESES ® gives you everything you need to model typical marine propellers and special types such as surface-piercing or racing propellers, high-skew propellers, ducted propellers and submarine propellers. The propeller add-on gets used by large companies such as ThyssenKrupp Marine Systems and Caterpillar .

Propeller Solids

CAESES ® is also able to create a solid propeller geometry from PFF files. Don’t waste time anymore with remodeling a propeller using traditional CAD systems. Just provide this simple ASCII file with your sectional data and generate a full propeller model including tip and hub – all with a single click, it just takes a few seconds. Such a model is ready for being manufactured but also for further studies such as CFD and stress analysis.

Tip and Fillet Modeling

There is dedicated functionality to close propeller tips with a smooth surface. For the fillet creation between the hub and the blade, you can choose between radii-based and variable-radii fillet surfaces. These fillets can also be varied and optimized automatically, if needed.

Choose between constant-radius fillets or define variable-radii fillets between the hub and the blade surface

Propeller Boss Cap Fins

CAESES ® allows you to design and optimize all sorts of energy-saving devices such as propeller boss cap fins .

Marine Example Applications

• Parametric ship design incl. hydrostatic calculation
• Hull form optimization (container carriers, offshore supply vessels, tankers, yachts, racing boats etc.)
• Propeller design
• Appendages and energy saving devices
• Design and placement of thrusters

Please find a summary of the CAESES ®  design capabilities for marine applications in this brochure (PDF) . There is also a short  tech brief (PDF)  about the most relevant features and benefits for ship hull form design in CAESES ® .

Aftbody Optimization

More Information

At FRIENDSHIP SYSTEMS our heritage is in the Shipbuilding & Marine sector, and we count many of the largest shipbuilders in the world as our customers. We have best-in-class expertise in parametric modeling of hull forms, appendages, propellers, etc. In order to drive the innovation of our products, FRIENDSHIP SYSTEMS has always been involved in challenging research projects for ship design and optimization.

CAESES ® is used by all leading ship design offices and ship yards in the world, such as Daewoo Shipbuilding & Marine Engineering (DSME) , Hyundai Heavy Industries, Samsung Heavy Industries, Kawasaki Heavy Industries, Shanghai Merchant Ship Design & Research Institute (SDARI), CSSC. In Germany, e.g. HSVA , TKMS, Meyer and Neptun Ship Design are using CAESES ® .

Further Interesting Articles and Videos

Here is a short read about a twin skeg study , and another blog post with a video about skeg modeling in 2 minutes . CAESES ®  can also be used to design and optimize very special ship hull components such as  spudcans (the “feet” of the jacking legs) . Interested in saving the planet? Read more about annual CO2 reductions by CAESES ® .

Please don’t hesitate to get in touch with us if you are interested in using CAESES ® for your specific marine application.

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