A Royal Naval Armament Depot (RNAD) is an armament depot (or a group of depots) dedicated to supplying the Royal Navy (as well as, at various times, the Royal Air Force, the British Army and foreign and Commonwealth forces). They were sister depots of Royal Naval Cordite Factories, Royal Naval Torpedo and Royal Naval Mine Depots. The only current RNAD is RNAD Coulport, which is the UK Strategic Weapon Facility for the nuclear-armed Trident Missile System; with many others being retained as tri-service 'Defence Munitions' sites.