Tankerman · Cargo — Heating Coils
Before energizing cargo heating coils, the tankerman should verify that:
- AThe cargo is above its boiling point
- BThe tank is empty
- CThe coils are covered by cargo and the heating medium return is monitored for cargo contamination (leak detection)✓ Correct
- DThe inert gas is shut off
Explanation
Coils must be submerged before heating to avoid local overheating, coking, or a fire/vapor hazard from exposed hot coils. The condensate/return from steam coils is checked for oil, which would reveal a coil leak letting cargo into the heating system (or seawater into the cargo).
Authority: ISGOTT; cargo handling references
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