submarine combat patrol

anti-submarine warfare patrol aircraft

patrol, on patrol

patrol, wheeled patrol

daysack, assault sack / pack, patrol / day pack, Northern Ireland (NI) patrol sack

submarine combat control system

combat air patrol (CAP) aircraft

combat patrol

combat air patrol mission

combat air patrol

anti-submarine search

anti-submarine ship

anti-submarine warfare (ASW)

anti-submarine warfare cruiser

anti-submarine warfare officer

anti-submarine warfare platform

anti-submarine warfare sensor data

anti-submarine warfare ship

attack submarine (SSN)

ballistic missile submarine (SSBN)

coastal submarine

disabled submarine (DISSUB)

distressed submarine (DISSUB)

distressed submarine personnel

guidance submarine

guided missile submarine

HM Submarine

hunter-killer submarine

killer submarine

life guard submarine

mini-submarine

nuclear propulsion submarine

nuclear submarine