anti-submarine search

anti-submarine ship

anti-submarine warfare (ASW)

anti-submarine warfare cruiser

anti-submarine warfare officer

anti-submarine warfare patrol aircraft

anti-submarine warfare platform

anti-submarine warfare sensor data

anti-submarine warfare ship

anti-submarine defense

helicopter for anti-submarine warfare

anti-personnel-anti-material projectile

AV/AT mines (anti-vehicle / anti-tank mines)

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

nuclear-powered ballistic missile submarine (SSBN)

nuclear-powered submarine

Ohio-class submarine

open submarine warfare

submarine (SS; sub)