REGISTERED MARINE TECHNICIAN
LARCS - Lighter, Amphibious Re-Supply Cargo, 5-Ton (LARC-V)
The LARC-5 (Lighter Amphibious Resupply Cargo) is an Army amphibious
vehicle originally used in the 1960's to ferry supplies from ships
to shore. Its total possible load is 5 tons (hence the five after
LARC). The head of the Transportation Corps, MG Paul Yount, directed
the US Army Research Command (USATRECOM) in 1956 to build a boat
with the ability to drive on land. The prototype was built in July
1959 with final design produced in 1963.
They LARC V did not handle the way it was expected so, many were
given to around 35 reserve companies. The active duty 165th, 305th,
344th, 458th, and 461st Trans Coâ€™s received them.
The LARC V is primarily used by the Beach Group in surf-zone salvage,
recovery, and command and control roles, and for the transportation
of personnel and equipment. The craft are in excess of 35 years
old and require extensive maintenance and repair, nevertheless their
retention or replacement is considered essential.
The LARC V is a single-screw, four-wheeled, self-propelled, diesel-powered
amphibian. It has a cargo capacity of 10,000 pounds and a troop
capacity of 20. It has a range of 200 nautical miles on land and
40 nautical miles on water. It can attain speeds up to 22 miles
per hour on land and 8.5 knots at sea. 12 LARC V craft are presently
embarked aboard MPF ships.
The LARC(V)is an amphibious lighter constructed of aluminum, 35
feet long, 10-ft wide, and 10-feet 2 inches high. The current weight
of the craft is approximately 20,000 pounds (without cargo). Power
is furnished by an 8 cylinder Cummins V-903 Engine (rated at 295
BHP at 26000 rpm).
The craft is capable of operation in temperate, tropic, and arctic
climates, traveling on sand and coral beaches, unimproved roads,
off-road terrain and maneuvering through a surf of 10-foot breakers.
The engine is located in the stern over the propeller and drives
forward to a centrally located transfer case where power is transmitted
to all four driving wheels and/or the propeller.
The suspension is rigid and the 18.00 x 12 ply off-road tubeless
tires provide the only shock absorption. The propeller operates
in hull tunnel, which is fitted with a nozzle to improve efficiency.
Baseline speeds for the craft were 9 mph in water and 30 mph on
land with full rated load of 5 short tons. Thirty-five modifications
have been identified that will form the nucleus of a SLEP for the
craft. This SLEP would improve safety, reduce crew fatigue, improve
reliability, reduce maintenance costs, and increase service life.
Studies must be conducted to explore future capabilities to conduct
surf zone salvage, recovery, command and control, and the transportation
of personnel and equipment.
I have designed the survey formats, surveyed and consulted on 12
LARC craft through out the east coast and lake regions.