Program 4, Armored Troop Carrier (ATC)
"Workhorse of the Riverine fleet"
HISTORY: The Armored Troop Carrier (ATC) 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. ATC's
could carry a fully equipped rifle platoon of 40 men
as well as supplies. Other tests conducted with
ATC's were two 81-mm mortars in the well deck that
were placed on tires to absorb the recoil, and an
Army M-132A1 Flamethrower Track parked in the well
deck. A hydraulic winch was placed on the fantail to
sweep for command detonated mines. The ATC'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 t o dual
shaft drives. Top speed was grueling 8 knots. Crew
consisted of seven sailors.