attack submarine - a military submarine designed and armed to attack enemy shipping

auxiliary research submarine - a submarine for research purposes

conning tower - a raised bridge on a submarine; often used for entering and exiting

escape hatch - hatchway that provides a means of escape in an emergency

fleet ballistic missile submarine - a submarine carrying ballistic missiles

nautilus, nuclear submarine, nuclear-powered submarine - a submarine that is propelled by nuclear power

periscope - an optical instrument that provides a view of an otherwise obstructed field

schnorchel, schnorkel, snorkel breather, breather, snorkel - air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time

asdic, echo sounder, sonar - a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; sonar is an acronym for sound navigation ranging; asdic is an acronym for anti-submarine detection investigation committee

submersible warship, submersible - a warship designed to operate under water