conventional
atomic, ballistic-missile, nuclear, nuclear-powered
midget, miniature
enemy
attack

dive, sink
surface
sink sth
operate, patrol (sth)
the problem of submarines operating too close to fishing vessels

be equipped with sth, carry sth
attack submarines equipped with advanced anti-ship weapons
submarines carrying nuclear warheads

captain, commander, crew
base, fleet
attack, warfare

Submarine is used with these nouns:
volcano