Naval hatches, doors and marine cranes
Watertight hatches, shell and side doors, marine cranes and boat and tender launch and recovery systems for navy and commercial vessels.
Openings in the hull must close as well as they open
Every hatch, shell door and side door is an opening in the vessel's watertight boundary. It has to open reliably under load, lock in position and seal at sea. Cranes and launch and recovery systems on the same deck have to lift safely in a seaway and fit the available space.
We design the structure, the drive, the locking and the controls together, and take the system through class approval.
Structure, drive and control as one design
- Structural design and analysis of the closure or crane and its interface with the hull.
- Drive selection: hydraulic, electro-hydraulic or fully electric.
- Locking and sealing so the closure holds in position and is weathertight or watertight when closed.
- Control: local or remote operation.
- Class approval with Türk Loydu, Lloyd's Register, RINA or any other society.
Systems we design and build
Hatches
- Watertight hatches
- Hydraulic, electro-hydraulic or electric
- Local or remote control
Doors
- Shell doors
- Side doors
- Locking and sealing systems
Cranes and launch and recovery
- Marine crane systems up to 20 t, outreach up to 5 m (more on request)
- Deck cranes and handling equipment
- Boat and tender launch and recovery systems
What we define with you
| Vessels | Navy and commercial vessels |
|---|---|
| Systems | Watertight hatches, shell doors, side doors, marine cranes, boat and tender launch and recovery |
| Drive | Hydraulic · electro-hydraulic · fully electric |
| Control | Local or remote |
| Cranes | Up to 20 t, outreach up to 5 m as standard; larger to customer requirements |
| Tightness | Weathertight or watertight, to the vessel requirement |
| Approvals | Türk Loydu, Lloyd's Register, RINA or any other classification society; EN 10204 3.1/3.2 material certificates |
| Scope | Design, analysis, manufacture, testing, class approval, documentation |
Hull openings we have delivered
P4 · 2022Beach club shell door, 32 m motor yacht
3 × 2.7 m aluminium shell door cut into the hull, rotary actuators, 8 hydraulic locks, RINA.
P1 · 2022Fore and aft ramp doors, Turkish Navy LCMs
Ballistic steel ramp doors, hydraulic winches, Türk Loydu certified.
P5 · 2024Folding hydraulic hatch, 8 × 10 m
Large hatch with 2 × 24 kNm rotary actuators and locking cylinders.
Naval hatches, doors and cranes: common questions
Which naval closures and handling systems do you build?
Watertight hatches, shell doors and side doors, marine crane systems, and boat and tender launch and recovery systems for navy and commercial vessels.
Which drives are available?
Hydraulic, electro-hydraulic or fully electric drives, with local or remote control.
Do you handle class approval?
Yes. We work with Türk Loydu, Lloyd's Register, RINA or any other classification society the vessel is built to; our naval ramp systems for the Turkish Navy were certified by Türk Loydu.
What crane capacities do you offer?
Marine cranes up to 20 t with an outreach of up to 5 m as standard. Higher capacities and longer outreach are designed to customer requirements.
Watertight or weathertight?
Either, according to the requirement of the opening and the vessel.
Can you work to an existing hull opening or deck structure?
Yes. Retrofit work starts from the existing structure; on a 32 m motor yacht we added a beach club shell door and a balcony by cutting the hull together with the builder.
Naval ramp systems
Bow and stern ramps for LCM and LCT landing craft.
Yacht systems
Shell doors, garage doors, balconies, beach clubs and passerelles.
P1 · LCM ramp system
Fore and aft ramps for TCG Anadolu's LCMs, Türk Loydu certified.
New build or retrofit?
Share the vessel, the opening or lifting requirement and the class society. We will propose a concept.