Select a ship. Use keyboard left and right arrow keys to turn your ship. Select a position on the game board to deploy your selected ship. There are five ships; Aircraftcarrier (5 cells), Battleship (4 cells), Frigate (3 cells), Submarine (3 cells), and Minesweeper (2 cells). Your computer opponent has the same amount of ships. Sink theirs before they sink yours. It's a guessing game with a blend of strategy and luck.