crews in quickly dealing with any problems, and these reasons combined in the USMC decision to drop the turrets from inventory entirely at the end of 1972. Emerson Mini-TAT Developed to a Canadian requirement for their Bell UH-1N Twin Huey, the Mini-TAT replaced the M60s with a minigun. A number of these were loaned to the US Army for use during the famous J-CATCH experiments in the late 1970s. SH-3/HH-3A Sea King (Sikorsky S-61) Emerson TAT-102C A version of the TAT-102 (Tactical Armament Turret-102) designed specifically for use on the HH-3A helicopter, the TAT-102C mounted a single M134 Minigun in a fully traversable turret (for specifics see the TAT-102A in the AH-1 Cobra entry). Two such turrets were mounted on sponsons, one on each side of the aircraft. The complexity and questionable performance in the environment led to them being removed in favor of more conventional door mounted weaponry. CH-3E Sea King/HH-3E Jolly Green Giant (Sikorsky S-61R) The defensive armament system for the USAF's H-3E helicopters is described as standard to the HH-3E, and capable of being fitted as required to the CH-3E. The basic system comprises three M60 machine guns, one each at the forward door, the opposite emergency window, and the rear loading ramp. The forward two positions comprise pintle mounts on skate rails, while the rear loading ramp station comprises a pedestal mount on an armored floor plate. The floor plate slides on two tracks, forward and back, to and from its firing position at the edge of the ramp. Either the standard infantry M60 can be used, with standard 200-round ammunition boxes attached, or the M60D variant, feeding via flexible ammunition chutes from 750-round boxes fixed to the floor (or to the armored floor plate for the rear loading ramp position). CH-21 Shawnee XM153 Described as a system of four forward firing M60 machine guns similar to the later M6 series for the UH-1 helicopter. Not standardized. Offensive Armament Experiments were done using CH-21s with both fixed forward M2HB .50 caliber machine guns and forward firing rocket launchers. Neither system was standardized, but both paved the way for similar systems on later helicopter types. Defensive Armament UTTHCO deployed with a number of CH-21's, and experimented with field expedient bars mated to the cargo doors, fitted with M37C .30-06 machine guns and feed from boxes mounted on top of the weapon. Note: It would appear that similar