The Ultimate Guide to Cargo Operations for Tankers

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Real Life Incident

“A tanker was berthed at a private jetty in Kwinana,
Australia. It was an open harbor exposed to the sea
and tidal waves. During the high tide, the vessel
surged due to the action of waves. The spring ropes
were notable to take the full load, and they parted.

As a result, vessel shifted 5 meters forward thereby
damaging the shore loading arm. Later on, the
vessel was moored with additional ropes
• The cargo transfer system should be sufficiently isolated and drained to allow safe removal of blank flanges
• Those lines and manifolds which are not to be used for cargo transfer should also be blanked and isolated
19. l Marine Insight Cargo Operations for Tanker I 20. Cargo Manifold in Oil Tanker Ship

• All the scuppers and save-all trays should be plugged to prevent any spilled oil from escaping overboard. Drip trays must be in place
• It is important to ascertain that the cargo hoses and loading arms are in good condition and properly rigged
• Ensure that all cargo and bunker tank openings are closed
• The sea and overboard discharge valves must not be used during the operation and should be securely lashed or sealed
• Temporarily opened scupper plugs should be monitored at regular intervals of time

Real Life Incidences

“In Singapore, due to an oil spill on deck from cargo
manifold, a duty officer gave ab signal on VHF
as “
Universal Jetty 2 – Stop Stop Stop !“. The jetty
personnel on jetty two immediately stopped the
pump on the shore side. However, the oil still kept
coming on the deck. Later on, as the senior officers

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