Abstract: Electric circuitry for fuze mode selection and safe and arm function in an nti-ship guided missile is disclosed. Circuitry provides optional proximity fuze selection, and automatic proximity fuze lockout in case of direct target impact. Target proximity encounter results in instantaneous warhead detonation while direct target impact results in delayed warhead detonation to provide time for target penetration.

Abstract: A guided missile fuze comprising a safety-arming mechanism. Upon intentio launch of the missile the explosive train of the fuze is mechanically and electrically aligned, provided prescribed launch and flight events occur and a specific time has elapsed. The first step in the arming cycle of the present invention is the transmittal of intent to launch logic to the fuze by the pilot just prior to launch. This connects power to the fuze and removes a solenoid interlock from the mechanism. At separation the movement of a rod used to enable the rocket motor initiating device removes a second mechanical interlock from the device. After separation initiation of the rocket motor causes hot gas pressure to be applied to a piston located in the rocket motor section external to the fuze and interfacing with a plunger that extends from the safety-arming mechanism. Action of the piston on the fuze plunger applies arming energy to the mechanism.