Marine & Subsea

Bespoke equipment and analysis for safe, efficient marine and subsea operations.

Engineered for the demands of marine and subsea operations

From LARS and subsea vehicle integration to structural verification and naval architecture, Subco designs and qualifies equipment that fits your vessel and operations. We deliver fixed-price work packages covering everything from concept through to class-ready documentation — keeping your projects safe, compliant, and on schedule.

Talk to our engineers

Delivering bespoke marine and subsea solutions

From Launch and Recovery Systems (LARS) and subsea vehicles to structural verification and naval architecture analysis, Subco Engineering designs and integrates equipment that fits your vessel, workflow, and operational envelope—keeping projects safe, compliant, and on schedule.

Engineered steel structure fabricated from an initial design concept

Services in Marine & Subsea

Discover flexible, fixed-price engineering support in the Marine & Subsea industry.

What we deliver

Whether you’re mobilising a vessel, planning an inspection/IMR campaign, or integrating new mission equipment, we design bespoke marine and subsea solutions that integrate seamlessly with deck layouts, handling systems, and operational procedures. Every design is engineered for safety, speed, and alignment with recognised industry standards.

Launch and Recovery Systems (LARS)

A‑frames, winches, cursors, and handling aids; verification and documentation for safe launch/recovery.

Subsea vehicles and tooling

ROV/AUV chassis, modular skids, manipulators, survey and IMR tooling, trenching and intervention aids.

Deck equipment and integration

Sea‑fastening, lifting/handling frames, spreader beams, pad‑eyes, transport and over‑side arrangements.

Structural analysis and fatigue

FEA, lifting verification, fatigue life checks for frames, foundations, and interfaces.

Naval architecture and sea‑keeping

Stability, RAOs, motion envelopes, and safe operating limits for mission tasks.

Operations engineering

Procedures, operator manuals, FAT/SAT support, and class/owner review packs.

Trusted by industry leaders

""Working with Subco has been a positive experience from start to finish. Project updates were concise, constructive, and prompt, with their online portal making it easy to track progress. Changes and additional requests were handled with a proactive, solutions focussed approach that kept the project moving forward""

Marine Operations Lead, Marine & Subsea

Focussed on delivery

Our team has delivered bespoke handling systems, LARS upgrades, subsea vehicle tooling, and deck integrations across diverse marine missions—from survey and inspection to construction and heavy handling. We blend agility with engineering rigour to keep vessels productive and crews safe.

Meet our team
The Subco Engineering team at work in the Blyth office

Speak to our experts

We'll help you define the problem, assess your needs, and connect you with the right engineering expertise — giving you clarity and confidence to move ahead.