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BMT Defence Services Limited


+44 (0)1225 473 600


+44 (0)1225 448 714



Maritime House
210 Lower Bristol Road
United Kingdom


naval design engineering architecture in-service support hydrodynamics submarines auxiliaries warships combat systems technical assurance analysis ropeguard

Contact Name:

Johanna Probert

Contact Position:

Marketing Manager


Leading independent marine engineering and design consultancy with an international reputation for technical excellence and innovation in whole warship, submarine and auxiliary design and support


BMT Defence Services has over 25 years of naval design and engineering experience offering whole ship design and technical support for submarines, warships and auxiliary vessels to national governments, prime contractors and shipyards.

Providing services and support to complex defence engineering design and procurement programmes, BMT uses in-depth experience, broad technical expertise, long-term partnership management, impartial advice and reliability to exact customer requirements both on budget and on time.

Based in Bath, Fareham and Weymouth, BMT Defence Services is a subsidiary of BMT Group Ltd. 


Naval Design and Engineering

From concept design to plan approval, BMT Defence Services uses integrated teams comprising many naval design disciplines to design whole ship platforms for both government agencies and shipyards. Recent work includes the QEC Aircraft Carrier, the MARS tanker auxiliary for the Royal Fleet Auxiliary, RFA Argus and the Norwegian Logistics and Support Vessel, supplying services ranging from structural design, analysis and verification to platform life extension, disposal support, hullform design and optimisation, performance predictions and model tests, feasibility assessments, options analysis and technical assurance. 

Systems Engineering

Using proven processes, tools and in-depth experience in a range of complex domain projects and engaging stakeholders and the Defence Lines of Development, BMT can deliver capable defence solutions. Services include requirements engineering, system architecture and analysis, streamline capability delivery and acceptance planning and management.

Acquisition Support

Innovative systems engineering techniques across acquisition support and strategy, technical services, design support and trials and acceptance, which fulfil operational effectiveness and affordability for programmes.

Combat Systems

Enabling risk reduction and timely project completion, whilst maximising effective platform operation during the acquisition and upgrade of combat systems. BMT's knowledge across platform design, upgrade and installation, information and data management, and documentation can address pan-platform equipment integration issues, including transversals, platform hull-form considerations, and operational impacts at an appropriate design stage for optimum operational capability through-life.

In-service Support

BMT's in-service support team across surface ships and submarines is made up of SQEP and chartered engineers who have a comprehensive range of skills to support, maintain and improve naval platforms for a high level of fleet time availability and operational readiness. The technical team has a wide range of defence experience including life extension for major platforms, capability assessments and upgrades, technical assurance, engineering options development and combat system integration. 


The hydrodynamics division at BMT Defence Services covers naval and commercial vessel assessment and optimisation for efficiency, operability and regulatory compliance, including hull design, in-service hydrodynamic performance, trials services and green shipping. BMT's physical test results database combined with expert knowledge supports preliminary design through to final design validation for new designs or modifications to existing vessels.

Technical Assurance

Technical Assurance ensures that platforms comply with key requirements and standards across applications including design assurance, product assurance and engineering policy. As members of the Naval Ship Assurance Support Service (NSASS), BMT assists in the application and improvement of the framework for naval ship specifications, standards and assurance.

Structural Design and Analysis

Providing expertise and affordable solutions for both new structural designs and in-service platforms, our design, analysis and verification and Finite Element Analysis (FEA) services have been employed on projects such as the Royal Navy’s Aircraft Carrier (Queen Elizabeth Class) and the refit of RFA ARGUS, as well as on design solutions for fatigue issues and the assessment and design of structure required to support new equipment.

Technology Management

BMT Defence Services provides independent technology management advice to gain a clear understanding of project and technology risk, whilst identifying, exploiting and managing technology opportunities. Services include technology watch, market surveys, option analysis, horizon scanning, maturity and exploitation management, roadmapping and web-enabled visualisation tools.

Software Development

Utilising the latest technologies and development practices, BMT delivers web solutions, hosting and support services, mobile and visualisation applications and system integration for a variety of customers, including government bodies and many commercial companies.


Advanced rope guard design which reduces the risk of warships being temporarily withdrawn from active duty due to shaft fouling.

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