This is the gride one must navigate when playing sunken ships.

The numbers on the gride indicates how far the guess is from the sunken ship, counting spaces vertically and horizontally, not diagonally. An 'S' indicates there is a sunken ship there, but the game is not over till the entire ship is revealed. All this information is related in the Print box.

The Command Center is where the player enters coordinates. 'jt' tells the turtle icon to jump to the coordinates in the brackets.