underwater operation of engine

remotely operated (underwater) vehicle (ROV / ROUV); underwater robot

underwater-to-underwater missile

underwater robotic system for the autonomous neutralization of underwater mines

engine capacity / engine power, engine output

clandestine operation; covert operation

humanitarian operation; humanitarian relief operation (HUMRO)

PZ operation (pick-up zone operation)

noncombatant evacuation operation (NEO); non-combat evacuation operation

cut-off engine operation

engine run-up operation

rough engine operation

idling engine operation

reaction engine / motor (jet engine)

rotary engine (Wankel engine)

engine ground run / engine test

engine oil reservoir / engine oil tank

airbreathing jet engine / ducted jet engine

air-to-underwater missile

nuclear underwater burst

scuba (Self-Contained Underwater Breathing Apparatus)

small underwater craft

surface-to-underwater missile

underwater sticky foam

underwater target

underwater-launched missile system

underwater-to-air missile

underwater-to-surface missile

advanced underwater weapon

artificial underwater and beach obstacles

portable underwater tracking transducer

air-to-underwater guided missile

ballistic surface-to-underwater guided rocket