6. As each tank becomes full, as indicated by the
tank sounding teams, close the valve on the single-
valved stripping manifold.
7. When all tanks are ballasted, close the sea chest
valve and reposition the lock bar.
8. Lock the tankside valve (on the double-valved
filling and suction manifold) in the CLOSED position.
9. Open the telltale valves on the double-valved
manifold and drain the contents, then close these valves.
Thereafter, while the tanks are ballasted
with seawater, periodically open the telltale
valves to determine the condition of the tank-
side valves and transfer mainside valves.
Most ballast tanks will not fill completely.
Some will only half fill due to tank height and
draft of ship. Ballast liquid will seek its own
When it is necessary to offload JP-5, the service
pumps are used as transfer pumps due to their in-
creased capacity. JP-5 is discharged off the ship via
the transfer main, downcomer, filling connection, and
then to a barge, tanker, or fuel farm. Since the service
pumps are used as transfer pumps for off-loading
JP-5, the piping and valves in the filling and transfer
system and the service system must be aligned to
enable the service pumps to take suction from, and
discharge into, the same piping as the transfer pumps.
Assume, in this operation, that the entire fuel load
is to be offloaded, including the JP-5 in the service
tanks. This being the case, empty the service tanks
first, since no special preparations are required to take
suction from these tanks with the service pumps.
Off-Loading JP-5 From Service Tanks
Align the piping and valves as follows:
1. Open the service tank suction cutout valve be-
tween the service tank and the service pump suction
2. Open the service pump inlet valve.
3. Unbolt and rotate the spectacle flange (or line
blind) to the OPEN position in the cross-connecting
piping between the service pump discharge header and
the transfer pump discharge header. Unlock and open
the gate valve in this same line.
4. Open the valve between the transfer pump dis-
charge header and the transfer main.
5. Open the transfer main bulkhead cutout valves
leading to the downcomer.
6. Open the gate valve at the base of the down-
7. Open the gate valve at the filling connection.
When topside preparations have been made for
off-loading fuel, start the service pumps.
When pump discharge pressure reaches 80 psi,
SLOWLY open the globe valve on the discharge side
of the pump. Throttle pumps to avoid cavitating and
maintain a minimum of 35 psi back pressure for auto-
matic operation of pump motor controllers.
The service pumps are now taking suction from a
service tank and discharging overboard via the service
pump discharge header, transfer pump discharge
header, and transfer main, up through the downcomer,
and out the filling connection.
Continue the pumping operation as outlined
above until all service tanks have been emptied. Then
secure the pumps and align the system for emptying
the storage tanks.
The remaining 24 inches of JP-5 in the
service tank are consolidated into preselected
storage tanks by the motordriven stripping
Off-Loading JP-5 From Storage Tanks
The piping arrangement from the service pump
discharge header to the filling connection at the refu-
eling station remains the same.
Align the piping from the suction header of the
service pump to the storage tanks as follows:
1. Unbolt and rotate the spectacle flange or open
the line blind valve in the cross-connecting piping be-
tween the service pump suction header and the transfer