battleships warships corvette in a military combat zone maneuvering over water at sea. warships, boats perform tasks in sea,

military ship war naval vessel battleship warship boat sea nautical ocean destroyer water transportation battle harbor port radar technology dock frigate pier army crime force grey marine navy power protection security carrier conflict defense gun history industrial large maritime national sailing armed cruiser industry steel nature bridge marin sail transport battleships warships corvette combat zone maneuvering boats perform tasks sea navy