Dazcat Catamarans

the multihull design specialist


Tel: 01752 823900


Design Services & Process

Design Philosophy

Why Choose a Multihull?

Dazcat Design Services & Process:





Design & Project Outline:


From the Introduction meeting and the information we receive from you we will be able to develop a project outline. This will contain some initial sketches of the project together with a breakdown of the staged design process required and the potential design costs involved.

a picture of 2d GA design plans of the Dazcat 1460 concept

2D-GA Conceptual Design:


This is were the fun starts, we take the outline sketches and work with you to define exactly what you want, nothing beats a few brain storming sessions around a table with the client and designer to make your dream a reality. We will go through every aspect and take look at other projects to see what you like and what you don't like and from these meetings a number of draft designs will be produced until we get what you want were we will produce the final GA's from which we develop the 3d model from.

As you can see from the images on the left the level of detail you can expect from your final GA.

Full Scale Mock-up Option:

From time to time nothing beats seeing elements of your project full scale to get a sense of scale and place. Multimarine Composites can offer this service, were they can build a full scale sectional mock-up of your yacht using laser cut MDF. We have worked with MCL a number of times in varying degrees as it enables us to exactly tailor the project to you and as a client you can truly get a sense of what it will feel like. A photo of the MDF full scale mock-up of the R550

The picture shows a simple MDF mock-up of the main bridge-deck, galley and helm area of  the R550. From this clients and designers can physically feel the layout, placement of winches, instruments and view the site lines from various seating positions "theirs nothing worse than sitting down and all you can see is sky, even on a sunny day"

3D Design and Analysis:

3d design and analysis is were it starts to get very exciting as a client and as a designer, taking the 2d GA's and any information gleaned from any mock-up to develop and sculpt a full 3d model of your yacht design. This is probably the largest investment outside any mock-up within the design process, but it is an investment that can help save thousands of pounds during the construction process through minimising any design and spec changes throughout the construction and provide vital technical information.


The 3d modelling is also a vital tool to gain important technical information needed i.e.


• 3d Visual Assessment (External)

• 3d Visual Assessment (Internal)

• Sail & Engine Performance Analysis

• Hull Performance and Motion Analysis

A 3d image of the Dazcat 1460 catamaran concept
A 3d cut through image of the bridge deck of the Dazcat 1460 catamaran concept
A 3d hull ilustration of the Dazcat 1460 catamaran concept

Construction Plans:

When it comes to the construction plans the 3d model will play an important part in this process.

Because we "virtually" build the yacht or product we can gain a lot of technical information to produce the construction plans which can also be used to create CNC information to help in the construction


Manual & Certification:

Due to UK and European Regulation's we may have to provide an owners manual detailing the yachts construction and it's major components, This will also form part of the information required for any Certification process for your yacht if you use it commercially.



Over the years we have gained a large amount of experience designing Dazcat's for individual customers and to put into production so If you are an individual, small business or yacht manufacturer we can help you develop your yacht. All we need is the dream and the will to create it.


Dazcat design philosophy


Weight and displacement are among the most important design features of a performance boat – and here at Dazcat we pride ourselves on only designing boats that perform, often beyond their owners’ expectations. And as weight can kill the performance of a boat, it is imperative to design features into the boat that will improve its stiffness, lighten the structure and so enhance performance.


We do this by structural analysis of the design while the boat is in its primary design form. We then work from the inside out, productionizing and eliminating as many parts as possible, making the structure lighter, smoother, stiffer and simpler to build. Plumb bows are a standard feature, in order to increase the boat’s waterline length, which will in turn improve the length to beam ratio of the hulls, maximising its speed.


Dazcats incorporate the headroom needed within a reverse sheer deck line, combined with hull surfaces that are designed to form three-dimensional, elliptical curves for increased stiffness and reduced weight. Chines are features in our larger boats, increasing hull stiffness by dividing the hull sides into two panels. This reduces weight, expands accommodation and gets rid of the slab-sided look that can ruin a boat’s aesthetic appeal.


Volume and performance are a good evaluation of a boat’s cost. By increasing volume you increase surface area, which pushes up the cost of the boat by increasing the materials and time needed to build; the trade off is more internal living space and hence greater value. The interior volume of most cruising Dazcats is maximised for comfortable cruising. A high freeboard gives plenty of headroom all round, increases bridgedeck clearance, prevents bridgedeck slamming and creates a much drier working platform.


Performance is partly determined by the power-to-weight ratio of a boat. Extra power can be generated by increasing either the sail area or the lift coefficient by using different rig formats. There are many combinations of rig, ranging in performance and cost, but increasing rig or sail capacity has its limits, and depends on the individual client’s ability to be responsible with the increased power.


Part of the discussion process is to establish clients’ levels of ability and experience in order to recommend the right boat to fit both helm and crew, in order to ensure safe sailing. We can also offer training with qualified skippers where needed; our boats are great fun but they are not toys and need to be sailed intelligently. When they are, they really fly!


Another option for improving performance can be reducing overall boat weight by simplifying the design. One can do this and not compromise the internal volumes; remember length is a good thing but filling it all up with accommodation may not be. Bridge decks offer fantastic space and are especially useful in our chilly UK waters, but they also add to cost, weight and windage. A longer boat without a bridgedeck could be similar in cost to a shorter one with a bridgedeck.


There are several considerations that need to be factored into every element of any new design: what level of performance you want; the type of sailing; and how much money you want to spend. Once you have made these decisions you are ready to talk to us and we can make a start on realising your dreams. Alternatively, we have established designs listed on this site that you can choose from, and we are always happy to talk through any modifications you may want to make.


It is always great fun being involved in helping design and build a dream boat, and it will be our pleasure to help make your dreams come true.


Why Choose a Multihull?


Multihulls are not new, they are a proven technology going back thousands of years. They are not even new in European waters; the first European catamaran was built in 1662. Financed by King Charles II and built by Sir William Petty, the boat was called Invention, and the MkII version, Experiment, went on to win a race between Holyhead and Dublin. The first victory for multihulls, but not the last!


European multihull design has come a long way since then and development has been fast. Here at Dazcat, we believe multihulls to be the best way to enjoy the water, expanding your cruising ground and letting you explore our planet’s many beautiful estuaries and rivers, as well as its oceans. With any boat in the Dazcat range the journey is definitely the destination.


Multihulls create a safe, stable living environment, with more space to enjoy inside and out, and most importantly, more space for you to relax and have fun. Would you like a boat where the galley is on the level, where you do not need a gimbal for the cooker or big fiddles around the table? How about being able to enjoy a sit-round dinner for all while sailing at 10 knots with a glass of wine, with no fear of it spilling, 360º vision and pilot controls at your fingertips? Think we're exaggerating - read Daz's account of racing in the 2000 and 2010 Shetland Round Britain and Ireland Races in News.


Multihulls make great platforms for disabled sailing, with wide level areas ideal for a wheelchair. Dazcat was worked with several clients who are wheelchair users and most of our designs can be adapted easily. To find out read our disabled sailing manifesto.


For those who can’t bear to go ashore, we have the Dazcat RP (see the Design Archive), ideal for living aboard. This incredibly versatile vessel can also double up as a floating studio or workshop, as the internal layout can be constructed to suit any individual’s fancy. Initially designed for someone who couldn’t face climbing onto the bottom rung of the property ladder and was looking for viable alternatives, this design makes for a spacious and attractive place to live or work, with all the additional benefits a boat has to offer.


All this and reduced overheads; multihulls can be moored on drying moorings and beaches, reducing the need for expensive marinas. John and Eileen Marshall spent a total of £16 on marina fees in over a year’s cruising throughout the Med and Aegean on their Dazcat 975 Cloud Nine, preferring to opt for anchorages most deeper draft boats could not get to.


Much has been written and said about the greater performance you can get from a multihull over a monohull, so we won’t be going into that here, though you can read in more detail about the Dazcat design philosophy. If you want to find out more about the technical aspects we suggest you visit the About Multihulls section at Multihull Maven, which contains a very clear and succinct breakdown of why multihulls are so much faster without compromising stability, and how to decide what sort of design would suit you.


On the important issue of safety we do have this to say; imagine you are sailing at night, you hit a submerged object, and the hull of your boat is holed. Wouldn’t it be reassuring to know that, not only do you have another hull, but also separate watertight compartments, a double bottom and enough reserve buoyancy to still get you home safely? As William Petty said, way back in 1662, “The Devil can not stifle what I have so amply demonstrated.” Dazcat are dedicated to the design and development of multihulls, and to their being accepted as part of the yachting mainstream.


Foss Quay, Mill Road



PL10 1EN

United Kingdom

Tel: 01752 823900

Email: info@dazcat.com

Website: www.dazcat.com


Opening Times: By appointment

Information & Copyright: held by Dazcat