June 20,2008:
For the first time since World War
II, the U.S. Navy has a new lighterage system. "Lighters" are boats (barges,
actually) used to carry cargo from ship to shore. This is necessary in
situations where there is no port available, or not one with deep enough water
for the large military cargo ships to dock and unload. The new "Improved Navy
Lighterage System" consists of several different steel barge types (each about
80x24 feet and weighing 75-124 tons) that can be fitted together, sometimes to
form a jetty for cargo to be carried to land. But more often, the lighters,
using their own water jet propulsion systems, carry the cargo ashore. The water jet propulsion system, and shape of the
lighters, makes them more suitable for loading, and moving, cargo (usually
vehicles or cargo containers) from ship to beach or a jetty comprised of
sections of the new lighters.
Cargo
ships, especially the Maritime Prepositioning Ships, carry these lighters, like any other cargo,
or hung from the sides of the military transport ships. Each lighter can carry 150-270
tons of cargo. The new lighters use more
automation, bow ramps (so vehicles can drive off onto a beach). There are
several different types of lighters, some motorized. Some 300 of the new
lighters are being purchased. The first one entered service in 2005.