The interface of Battleship includes a 2 11x10 screens.
Each column is labelled from A to K on the top. Each row is labelled from 1 to 10 on the side.
On these two screens will be two buttons (one for red markers and the second for white markers) and 5 ships per screen.

The red screen is the player's view of their field. This screen contains the player's battleships. On these battleships will be red markers that are hit by the opponent, and white for missed hits.

The blue screen is the player's view of the opponent's field. This screen includes the player's previous attacks. On this screen, the red markers are placed in positions that are assumed as "HIT", and the white markers are placed in positions that are assumed as "MISS".