attack submarine
sub
wolf pack
subchaser
auxiliary research submarine
silent service
Q-ship
hunter-killer
missile defence system
ship of the line
missile defense system
man-of-war
submarine
pigboat
supersub
waster
tin can
wolfpack
sub tender
Aegis class cruiser
U-boat
weather ship
operating depth
frigate
tackling
naval weaponry
torpedo ram
X-craft
corvette
minisubmarine
autosub
USS Cole
air cover
torpedo-boat destroyer
commerce raider
enemy
line of defense
depth charge thrower
line of defence
blockade-runner
brown-water navy
belt
fleet ballistic missile submarine
coverage
submarine torpedo
crash dive
alexine
blueliner
letter of marque
bow chaser