in-port mode. DC central will inform the OOD,
7. The pump-room personnel will observe and
who will, in turn, inform the CDO that the CHT
verify that the pumps in the automatic mode are
system is in the in-port auto mode.
operating properly. Two cycles of operation are
required to verify that the pumps alternated. To
The petty officer of the watch will log the time
accomplish this, the pump-room personnel will take
that the CHT system was shifted to the shore
the following actions:
connection. If the sewage offload barge is alongside
at anchorage, the petty officer of the watch will log
a. Open the tank washdown supply valve
the times that the pumping started and finished.
(L) to raise the level of the tank to be
The log entry is required to protect the ship in the
event of a sewage spill in the vicinity by another
ship. Furthermore, each ship should set its own
b. Check the pump-room fittings and
procedures to ensure that the CHT connections at
components for leaks. Immediate action
i s required to correct any leaks
the deck discharge valve, the shore connection, and
any hose connections in between are checked for
leakage. These checks should be conducted at least
once each hour.
c. Pump down the pump-room sump.
If a leak goes unnoticed and releases sewage
d. Upon completion of these actions, stow
into the water, the ship will be in violation of the
the phones in the stowage box in a clean
pollution control law. If a leak should occur
topside, all of the pump selector switches should be
placed in the OFF position. The system will need
e. Clean the pump room and themselves.
to be placed in the transit mode and the waste drain
Personnel hygiene is important to
diverter valves (J) diverted overboard. Immediate
protect everyone's health.
action is required to repair the leak.
Notify DC central that the tank has been
When the ship joins a nest of ships alongside a
pumped down and that the system is in
pier, the nesting procedures are used. (See fig.
the automatic mode for that pump
17-4.) These procedures are basically the same as
if the ship were to go alongside the pier by itself.
The ship's force personnel will be required to rig
DC central will then update the CHT system
and connect the hoses to their ship and to the
status board to show that the valves are in the
Figure 17-4.--Nested ship sewage transfer.