Page 25 - NSRI_ORC140 USER MANUAL

6.11. ORC 140 REFUELING
The following SOP needs to be followed:
• Bosun to check fuel used on each engine.
• Deck crew member to be on standby on the vessel deck, with a fire extinguisher, in case of a
fire during refuelling.
• Open fuel filler cap on each tank, and fuel tank breather vent on each tank.
• Deck crew to start electric fuel pump on the trailer to do the fuel transfer into the rescue vessel.
• Deck crew to place fuel hose nozzle in fuel filler pipe for the fuel tank and fill the required number
of litres.
• Close fuel filling point pipe cap and fuel breather cap.
• Deck crew to stop the fuel transfer pump when the fuel tank is full.
• The same SOP is to be followed filling the next tank.
• Clean up any spilt fuel.
• Fuel used to be given to the Navigator for recording and to be added to SeaWeb.

6.12. ENGINE ROOM MECHANICALLY DRIVEN BILGE PUMPS
There are two mechanically driven bilge pump fitted to the port and starboard engines. They are
driven by the engines through a magnetic clutch which is switched on and off from the wheel-
house dashboard.
When the electric bilge pumps are operational and not coping with the inflow of water, the me-
chanical bilge pumps needs to be operated as well.

• There are two mechanical bilge pump manifolds, one the port side aft of the engine room and
the other on the Stbd side forward of the engine room bulkhead. The Port bilge manifold pumps
from the rudder space and the aft engine room and the Stbd manifold pumps from the fwd engine
room, tank space and fwd cabin compartments.
• Open the suction valve to the compartment with the high-water level condition.
• Coxswain/helmsman to engage the magnetic clutch of the selected engine. The engine has to
be running to drive the mechanical pump.

• Coxswain/helmsman to raise engine RPM to required bilge pump RPM - in gear or neutral, as
conditions dictate.
• The source where the water is flooding into the compartment needs to be found and stopped to
stop the flow of water into the compartment, e.g. a hole in the hull or leaking water pipe on one of
the engines.
• Bilge water will be discharged onto the aft deck during bilge pumping operations port or stbd
sides depending on which pump you are using.

• Bosun to monitor the water level in the compartment been pumped to ensure that the mechani-
cal bilge pump does not run dry. If the pump is run dry it will burn the rubber impeller, which will
lead to pump failure.
• When the pump starts to suck air, the magnetic clutch needs to be disengaged to stop the pump.

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