Abstract: The present application discloses a ship collision preventive aid apparatus in which a radar picture and a key picture are selected from all pictures displayed on a display means as transmitted through a touch panel, and the operator touches the surface of the touch panel, so that a program for an operation key name selected is executed. Predetermined collision preventive aid data required for collision avoidance are then displayed on a display screen.With operation simplified, appropriate information concerning collision avoidance may be supplied and the entire construction is simplified.