The Companies are:
Submarines: Submarines are some of the most feared weapons of war used today, since they can go underwater for weeks at a time, and fire missiles at un-lucky surface ships, submarines are a force to be reckoned with
Aviation: The Navy has it's own planes and pilots apart from the Air Force, Navy planes have much the same uses as Air Force planes
SEALs: These are the elite of the Navy, special forces, they are highly trained in many ways, and they carry out missions all over, their ability to conduct quickly is a great asset
Surface Ships: Surface ships are all ships, obviously ranging in size, from small patrol boats, to larger ships, such as Frigates or Air Craft Carriers, Surface ships main job, is escorting civilian ships, since 70% of the Earth is made up of water, but ships also provide off-shore bombardments, transportation, and they also fight their own fights at sea against enemy ships
Submarines:

Aviation:

SEALs:

Surface Ships:
