Quantcast Chapter 7. Ship to Ship Connection

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7.1.1 NESTED VESSELS.  Ship-to-ship sewage hose connections will occur in
two cases:  (1) where several surface vessels are nested at the same berth-
ing space on a pier, and (2) where submarines are nested against a docked
tender.  In the second instance, each submarine is connected separately to
the tender, since submarines do not have the "pump-thru" feature of the CHT
systems on surface vessels.  Similarly, each submarine nested directly
against the pier would be connected through a separate hose to the sewage
risers on the pier.
Ship-to-ship connections are made on nested surface vessels, where CHT
piping permits an outboard ship to pump into the adjacent deck riser of the
next inboard ship (see Figure 7-l).  The sewage passes through the inboard
ship by means of athwartship piping leading to the discharge riser on the
opposite side of the ship.  The second ship, if it is not against the pier,
transfers the outboard vessel's sewage along with its own sewage to the next
inboard ship.  Sewage from all of the ships in the nest flows into the pier
sewer via the connections of the vessel against the pier.  There is no
re-pumping of sewage as it passes from ship to ship.
Sewage hose is used to connect the athwartship sewage piping of the
nested ships by means of their deck risers.  The same type of hose is used
for ship-to-ship connections as for connecting ships to pier sewage risers.
The CHT systems of several nested surface vessels are linked together by
connecting a hose to the inboard riser of the outboard ship and to the out-
board riser of the next inboard ship.  The second ship connects its inboard
deck risers to the outboard risers of the next ship.  The steps are repeated
until all ships in the nest are connected in series to the ship against the
pier.  Sewage hoses connect the inboard risers of the ship against the pier
with the pier sewer to convey sewage ashore from all the vessels in the nest.
Figure 7-2 illustrates schematically the deployment of the hoses.
Sewage hose used for ship-to-ship connection is supplied by the shore
activity, which handles all sewage hoses.  At the time of arrival of the
outboard surface vessel, the shore crew transports the proper length of clean
sewage hose from storage to the pier.  The hoses are brought to the side of
the vessel against the pier at the berthing space.  Connection procedures
may start as soon as the first vessel is tied up.


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