4Ocean Design provides engineering and consultancy services supporting shipowners, operators and technology providers in planning and delivering vessel modifications and conversions. Our core focus is on retrofit projects, including deck equipment upgrades and integration of onboard systems. We deliver feasibility studies, onboard data collection, concept and basic design, class-compliant documentation and detailed engineering to support safe and efficient implementation. The team has experience across offshore, workboats, research vessels and special-purpose ships, covering installations such as cranes, moon pools, winches and alternative propulsion systems. We help clients reduce technical risk, optimise arrangements and solve integration challenges, ensuring smooth execution from initial concept through to shipyard delivery and as-built documentation.