Decklocks are a critical part of the system for securing and manoeuvring helicopters during operation from smaller ships such as Frigates or Coast Guard Cutters. The Decklock is an active device, mounted on the helicopter, which secures the aircraft to the passive Grid fixed into the ships flight deck. This approach gives the pilot control during landing and take-off and allows free access all round the aircraft for deck handling or replenishment of stores. The Decklock can be integrated into the aircraft systems to provide a constant securing load without external power supplies and semi-automatic operation on landing. All electric versions are being developed for VTUAV (Vertical Take-off Unmanned Air Vehicle) operation.