If you opt for a bachelor of science degree then it may be useful to know that most of the bachelor of science degrees complete in four years but some can even take more because of the research projects and the requirements of the subjects.
USS Cod (SS/AGSS/IXSS-224) is a Gato-class submarine, the only vessel of the United States Navy to be named for the cod, named after the world's most important food fish of the North Atlantic and North Pacific. Her keel was laid down by the Electric Boat Company of Groton, Connecticut on 21 July 1942.
Additionally, the Ohio class (Trident) submarines (SSBNs and SSGNs) also have a Missile Compartment between the Operations Compartment and Reactor Compartment. Although not a compartment or level, let's start with the space in the top of the submarine's Sail, called the Bridge Cockpit, or simply the Bridge.