Program 4, Armored Troop Carrier (Helicopter)
"Smallest flat-top in the world"

HISTORY: The Armored Troop Carrier (Helicopter) was converted from an LCM(6) Landing Craft of WWII fame. Modified with bar armor, which prematurely detonated the warhead of an enemy RPG or recoilless rifle round and reduced penetration of any secondary armor plate. Styrofoam sponsons were added along the hull to assist in flotation and alleviate some of the added weight due to all the extra armor on board. Some ATC's and Refuelers were fitted with a light steel plank helicopter platform to facilitate in the evacuation of wounded personnel. Hence the designation ATC(H). Some ATC(H)'s were even fully equipped as aid stations. A winch was placed on the fantail for chain drag equipment to sweep for command detonated mines. The ATC(H)'s weaponry included two .50-cal MG's in a turret port and starboard on the pilot house, A Mark 16 (Mod 4) 20-mm cannon in the aft turret, and numerous Mark 21 (Mod 0) .30-cal MG's amid ship. Power was provided by twin Detroit Diesel engines connected to dual shaft drives. Top speed was a grueling 8 Knots. Crew consisted of seven sailors.