Submarine components

thumb|right|Principle of the periscope. The periscope on the left uses mirrors whereas the right uses prisms. a Mirrors b Prisms c Observer's Eye

thumb|right|280 px|An airlock on board Space Shuttle Atlantis

device which allows a submarine to operate submerged while taking in air from above the surface

removable submarine module

sonar reducing and sound altering tiles

Waterproof superstructure of a submarine.

piece of naval technology

system of hydrophones

sensor on a submarine which functions similarly to a periscope without requiring a periscope tube