NAAFI personnel serving aboard ship are part of the Naval Canteen Service (NCS), wear naval uniform and have action stations, but remain civilians. NAAFI personnel can also join the Expeditionary Forces Institute (EFI), which provides NAAFI facilities in war zones. EFI personnel are members of the Territorial Army serving on special engagements, bear ranks and wear uniform. NCS personnel can similarly volunteer to join the Royal Navy when it goes on active service. Petty Officer John Steven Leake, NCS canteen manager in HMS Ardent, was awarded the Distinguished Service Medal (DSM) in the 1982 Falklands War for his courage while manning a machine gun.