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Severn Marine Design was established in 2017 with the aim of providing quality design support and naval architecture expertise to the marine industry. The majority of our experience is in the design and production of workboats up to around 50m LOA. We have particular expertise in structural design and modelling, having successfully delivered over 25 CNC structural kits since incorporation.

We have also designed complete vessel structures to class including Lloyd's Register, Bureau Veritas and American Bureau of Shipping.

We have provided design support in all areas of vessel design on a variety of projects.

We are meticulous in our approach and dedicated to finding efficient solutions to our clients problems.



Naval Architecture

Severn Marine Design can assist in all areas of naval architecture including hull surface generation and fairing, general arrangement design, structural design, stability assessment, lightship survey and stability booklets, loading calculations and weight estimates, and general design consultancy.

We also provide high quality modelling and rendering for presentation and marketing purposes.

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Structural Modelling & CNC Kits
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CNC Parts Nest
Pilot Boat Structure

Using the latest ShipConstructor software, we can model the entire structure of your vessel and output all of the cutting files and assembly information needed to fabricate your vessel.

Save time in the design phase

  • Modelling can begin as early as required based on simple construction drawings and preliminary scantlings data

  • We can take over development of the structure drawing as modelling progresses, or provide regular accurate output from the model to keep design drawings up-to-date.

  • Difficult areas can be explored and resolved as part of the modelling process

  • Regular 3D model exports can be provided to aid with the design of systems and fitout

  • Regular accurate weight reports can be provided for the structure.

Save time during fabrication

  • All aspects of fabrication are pre-defined in the model, so there are no 'blind spots' left for the builder to resolve.

  • Accurately fitting parts allow rapid assembly with minimal intervention or adjustment on the shop floor.

  • Pre-cut limber holes and weld reliefs included on all parts as required.

  • Datum lines and orientation icons placed on parts to aid assembly.

  • Part intersections, stiffener labels, and bending lines and information marked on cut plate parts.

Included Output

  • Part nest drawings including expanded shell plates, and profile lists with endcut details.

  • 3D model in Navisworks and Rhino formats.

  • Detailed assembly drawings - format can be tailored to designer/builder requirements and to suit the build strategy.

  • Detailed report of all parts including weights, areas and centres of gravity.

Design & Engineering Services

Severn Marine Design can assist with a broad range of design and engineering services including;

  • Vessel structural design and engineering 

  • Systems design including machinery and propulsion installations, steering systems, auxiliary systems, ventilation and air conditioning etc.

  • Design of bespoke deck equipment including MOB recovery systems, boarding ramps, lift points, anchoring and mooring equipment, handrail and safety rails, stowage etc.

  • General arrangement and fitout, insulation, console and control station etc.

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For any inquiries, questions or commendations, please call: +44 (0)1743 224202 or fill out the following form

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Head Office

Severn Marine Design Ltd

12 Rowan Close




Tel: +44 (0)1743 224202

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