SHIP WASTE OFFLOAD BARGE, SEWAGE
7.4.1 DEPLOYMENT AND USE OF SEWAGE BARGES. Thirteen barges configured to
receive and transport ships' sewage have been assigned to Navy activities.
UNDER NO CIRCUMSTANCES SHOULD SHIP SEWAGE BE LOADED ABOARD BARGES THAT ARE
DESIGNATED TO BE WASTE OIL BARGES, OR VICE VERSA.
Ships at anchor or moored in the stream eventually will pump their sew-
age through CHT systems to sewage barges for transfer to shore. Sewage
barges will be towed periodically to pierside for emptying into the pier
sewer system. Ordinarily, this operation will occur at a space reserved for
sewage barges. However, if necessary, a sewage barge may pump its contents
into the pier sewer system at any standard pier sewer riser. The barge crew
should notify the shore crew of an intent to discharge to the pier sewer
system. DURING ALL TOWING, LOADING, AND UNLOADING OPERATIONS, THE AIR COM-
PRESSION SYSTEM SHOULD BE OPERATED.
a. Sewage Transfer from Ship to Barge. Upon arrival at a ship, the
barge crew heaves a line to the ship's hose handling crew. The ship's crew
hauls the ship's end of the sewage hose up to the ship in the vicinity of
the deck sewage riser on the ship CHT system. The sewage hose is connected
to the ship's riser and properly tied off and supported. The barge end of
the hose remains connected. Riser valves on both the ship and the barge are
opened. Then the CHT system is placed in the pump-ashore configuration and
the ship begins discharging sewage into the barge. THE BARGE'S AIR COMPRES-
SION SYSTEM SHOULD BE ON WHEN LOADING THE BARGE.
b. Unloading the Barges. Sewage barges will carry their own hoses and
should not need service by a shore crew for connection to pier sewer risers.
However, shore support will be needed to provide electrical connections to
the SWOB. Upon arrival at pierside to tie up, hose is hauled ashore manually
with a heaving line by members of the barge crew. The hose is connected to
a pier sewage riser and the valve of that riser is opened. With the air
compression system remaining on, discharge valves aboard the barge are opened
and sewage pumps started. After the barge has discharged its sewage cargo,
salt water from the pier is connected to the salt water riser on board the
sewage SWOB. This will activate the orbijet sprayers. The orbijets should
be operated for a period of at least 15 minutes to ensure that the tanks are
washed adequately. Once washdown is completed, the pumps on board the SWOB
are activated and the washed tank is emptied through the sewage hose to the
pier. After the tank has been stripped, it is recommended that a second
15-minute tank washdown be performed. This will ensure that the tanks are
cleaned and that the sewage hoses have received sufficient flushing.
Following salt water flushing, the pier salt water is
secured and the
pier sewer riser valve is closed. All discharge valves on
the barge are
closed. The pier end of the hose is disconnected from the
pier riser and
transferred manually to the barge via a heaving line. The
barge is then
ready for additional assignments.
Scheduling and rotation procedures for sewage barges must be developed
locally. Factors to be considered include: number of barges available,
number and sizes of ships to be serviced, tug availability, and distances to