Hydro-pneumatic Fenders
Submarines and other vessels which contact fenders below waterline require a unique solution. Hydro-pneumatic fenders are specially adapted to this application. The fender body is partially water-filled, then pressurised with air and ballasted to make it stand vertically. Fender draft and performance can be tuned by altering the water:air ratio and inflation pressure.

Features
- Sub-surface contact face
- Very low hull pressures
- Variable draft
- Prevents acoustic tile damage
Applications
- Submarines
- Some fast ferries
- Semi-submersible oil rigs