Your drafts are: FWD 6'-01", AFT 6'-05". From past experience, you know that the vessel will increase her draft by 1 inch for every 7 tons loaded. There is rig water on board and 20 tons of deck cargo. How many more tons of cargo can be loaded while maintaining the same trim? See illustration D037DG below.
Official USCG Answer & Rule Citation
Correct Answer: Option C — 14.0 tons
Multiplying the allowable draft increase in inches, derived from stability reference illustrations and loadline limits, by the vessel's specific tons-per-inch factor yields the remaining cargo weight capacity that can be safely loaded without altering trim.
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