Patent US 4,189,145

A periscope in a submarine type video game is simulated where there is a correspondence between the actual motion of the rotation of the periscope produced by the player and the perceived motion on the video screen which is observed by the player. Various ships cross the screen which are targets of the game. The apparatus generates several ships at one time throughout a panoramic view and the player by rotation may bring any one of these ships into his actual more narrow field of view.