The Ultimate Guide to Cargo Operations for Tankers

rushed to the spot, they intimated

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rushed to the spot, they intimated that the vessel
was berthed at Universal Jetty 1 and not Jetty 2.”

“While loading cargo at Port Klang, Malaysia, the
deck watch opened the scuppers at the aft to drain
the rainwater. In the engine control, fuel oil was
being transferred from one tank to another. During
the transfer, the fuel oil tank overflowed, and thus oil
escaped overboard through the aft scupper. During
the rounds, the deck watch noticed oil sheen in the
water and closed the scuppers immediately.”

21. l Marine Insight Cargo Operations for Tanker I 22.

Considering leakage of cargo vapors or inert gas on deck from vessel or terminal, the openings for accommodation, external doors, ports of stores etc. must be closed, and the air condition unit should be put on recirculation Emergency Preparedness
• To assist the shore firefighting team in an incident of fire onboard, a copy of ships fire plan and cargo stowage plan should be kept near the gangway or at an external place which is easily accessible
• To avoid fire hazard, all cargo tanks should be inerted with positive pressure, and oxygen content of less than 8 % by volume must be maintained
• The ship should be enabled to move under its power at all times while it is alongside a terminal
• Adequate personnel to be available onboard and ashore to deal with an emergency
23. l Marine Insight Cargo Operations for Tanker I 24. Fire Drill on Ship

• The emergency procedure and shutdown signal should be understood and explained to both ship and shore personnel
• The material safety data sheet for cargo to be transferred is a mandatory requirement
• The hazards and toxicity of various oil cargoes and vapors must be identified and understood
• Various operations such as tank inspection of empty tanks, ullaging and sampling of loaded tanks should be carried out by closed methods to ensure zero exposure to cargo or IG vapours
25. l Marine Insight Certain crude oils known as sour crudes contain high concentrations of HS in addition to HC vapours. These are namely Maya and Isthmus crude oils. While sampling or doing ullaging of these cargoes caution should be exercised as even the slightest amount of gas contains high ppm of HS which can be fatal for humans. Several crude oils like Captain Crude from Nigg Bay UK. is said to produce severe skin irritations if they come in contact with the skin Cargo Operations for Tanker I 26. Emergency Stop Hand Signal

• The High-Level Alarms (95%) and Overfill alarms (98%) must be checked to be fully operational as their malfunction during topping up can lead to an oil spill on deck
• The tools used on deck must be of NON-SPARK type, and no naked lights, mobile phones, cameras must be allowed on deck or within terminal areas
• Smoking should be permitted only at designated smoking places onboard
27. l Marine Insight Cargo Operations for Tanker I 28. High Level & Overfill Alarm on Bridge No Smoking on Deck

• The tank venting systems should be agreed before carrying out the operation. They can be through mast riser or pressure/vacuum valves
• If a vapor return line is connected, its operating parameters must be agreed by both the parties
• Since the cargo moves at high velocity inside the pipeline, accumulation of static charges is impending. To avoid this, loading arms must be connected to a bonding plate or cable to dissipate the charges. Suitable insulation must also be provided
• The ships aerials of radio transmitters and radars to be switched off as they emit high energy electromagnetic waves
• Portable VHF / UHF must be intrinsically safe
• If any portable equipment tool is connected with electrical cables within the hazardous area, it should be disconnected

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