Sewage Transfer During Tender Operations
During all tender operations, sewage is
transferred from the ships being serviced to
receiving stations in the tender. Typical receiving
stations in submarine tenders and surface ship
tenders are shown in figures 17-5 and 17-6. The
tender then transfers the sewage to the receiving
Layouts for submarine sewage transfer hose
connections differ from those of surface ships in
that each submarine always uses independent hoses
for direct transfer to a tender or receiving facility.
That is, when nested, submarines do NOT discharge
sewage through inboard ships to the receiving
facility as in the case of nested surface ships.
Tenders furnish 4-inch sewage transfer hoses
with quick-disconnect fittings for surface ships and
2 l/2-inch hoses with quick-disconnect fittings for
submarines. In the following paragraphs, we will
discuss shipboardsewage transfer procedures unique
to tender operations.
TENDER RECEIVING SEWAGE FROM
SURFACE SHIPS.--Before sewage can be
Figure 17-6.--Surface ship receiving system.
transferred from tended ships, sewage hoses must be
connected to the tender sewage-receiving station
according to the procedures previously discussed.
Then, open tender receiving station stop valves (R)
and comminutor isolation valves (S) (see fig. 17-6).
The surface ship should then be advised that
transfer operations may begin.
When hoses are connected during
nesting operations, no valves are to be
opened until after all connections are
made. If the high-level alarm sounds on
the tender while a tended ship's tank is
being emptied, notify the ship to stop
transferring, and then close the receiving
station's stop valves. Investigate and take
corrective action before restarting transfer
Figure 17-5.--Submarine tender receiving system.