The A/A weapon select switch selects the Sparrow missile on the priority station when the switch is in the FWD position. Each time the switch is depressed, the priority station changes. SEL is displayed on the DDI underneath the SP acronym of the station selected. An X is superimposed through the SP when the missile is not tuned. The X disappears when the missile tunes. The RADAR switch is located on the sensor control panel. AIM-9 Sidewinder Fire Control System The Sidewinder fire control system provides the aircraft with the capability for firing a Sidewinder missile. Control of the missile is provided through the SMP. No voltage is supplied to fire the missile until the trigger switch is pulled. Weapon selection is made by the A/A weapon select switch on the aircraft controller grip assembly. Tone volume is controlled by the WPN VOL switch. The system consists of the IR COOL switch, trigger switch, and the armament basic controls and components. The A/A weapon select switch selects the Sidewinder missile on the priority station when the switch is in the DOWN position. Each time the switch is depressed, the priority station changes. SEL is displayed on the DDI underneath the SW acronym of the station selected. The WPN VOL switch is on the intercommunication amplifier control panel assembly. The IR COOL switch is a three-position switch on the map gain control panel assembly. When the switch is in the OFF position, coolant is disabled to the seeker heads unless weight is off the wheels, the MASTER switch is in the ARM position, and the station is selected. In the NORM position, coolant is enabled to all seeker heads when the weight is off the wheels. In the ORIDE position, coolant is enabled to all seeker heads when power is applied to the aircraft. M61A1 20-mm Gun System The M61A1 20-mm gun system provides the aircraft with the capability for firing the gun. The system enables selecting, arming, and firing. Depending upon the mission objective, the gun can be operated in the A/A or the A/G computer modes. In the A/G mode there are two submodes. The two submodes are the continuously computer impact point (CCIP) and the manual (MAN) modes. There are three A/A modes. These are the director, disturbed, and the cage modes. Control of the gun is supplied through the SMP. No voltage is supplied to the gun until the trigger switch is pulled. AN/ALE-39 Decoy Dispensing System The AN/ALE-39 decoy dispensing system provides the aircraft with the capability for dispensing chaff and flares. The decoy rounds are contained in two dispensers at the fuselage underside area. Control is supplied through the SMP. The system consists of the dispenser/ECM control panel, engine throttle lever grip assembly, left console DISP switch, the ALE-39 programmer, two AN/ALE-29A dispensers, and the armament system basic controls and components. ANTISUBMARINE WARFARE WEAPONS SYSTEMS Learning Objective: Recognize various weapons systems on ASW type aircraft. Antisubmarine warfare (ASW) is becoming an ever broadening field. Our ASW capabilities have been improving constantly. As a senior avionics technician, you must play the key role in maintaining the ASW platform used for in-flight launching of search and kill stores. When launched at precise intervals and locations and in conjunction with the aircraft’s electronic data processing equipment, these stores provide accurate information for detecting enemy submarines. The kill stores consist mainly of torpedoes, mines, bombs, rockets, and guided missiles. The remainder of this chapter discusses the basic ASW system, the P-3C and S-3A search store systems, the helicopter search store systems, the P-3C and S-3A kill store systems, and the helicopter kill store systems. Finally, the control systems for release and control of search and kill stores are discussed. BASIC ASW WEAPONS SYSTEMS The basic ASW weapons systems  consist of the equipment and accessories necessary for carrying and releasing the search and kill stores. 7-11