Tankerman · Operations — Topping Off
During topping off (the final stage of loading), the tankerman should:
- AReduce the loading rate so high-level/overfill alarms and final ullages can be managed without an overflow✓ Correct
- BIncrease to maximum rate to finish quickly
- CLeave the manifold unattended
- DOpen all tank tops to atmosphere
Explanation
Topping off is the highest-risk loading phase. The rate is cut so the watch can monitor ullages, respond to high-level and overfill alarms, and shut down precisely at the planned level, preventing an overflow and spill. Only one or two tanks are topped at a time under close attention.
Authority: 33 CFR 156; ISGOTT
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