A navy is the branch of a nation's military forces principally designated for naval warfare and amphibious warfare; namely, lake- or ocean-borne combat operations and related functions.... ship
Ship
A ship is a large watercraft that floats on water. Ships are generally distinguished from boats based on size. Ships may be found on lakes, seas, and rivers and they allow for a variety of activities, such as the ferry or cargo ships, fishing, cruise ship, Coast guard, and warship.... that is confined to the surface of the sea. The term is primarily used to mean any modern vessel type that is not a submarine
Submarine
A submarine is a watercraft capable of independent operation below water. It differs from a submersible, which has only limited underwater capability.... ; although a "surface ship" may range in size from a cutter to an aircraft carrier
Aircraft carrier
An aircraft carrier is a warship designed with a primary mission of deploying and recovering aircraft, acting as a seagoing airbase. Aircraft carriers thus allow a navy force to project air power great distances without having to depend on local bases for staging aircraft operations.... , the weapons and tactics have some commonality, more so than for submerged vessels.
