You have 650 tons of below deck tonnage including liquid mud. Your existing deck cargo is 140 tons with a VCG above the deck of 2.5 feet. What is the maximum additional cargo tonnage you are permitted to load? See illustration D036DG below.

Correct Answer: Option C — 83 tons

Applying 46 CFR stability criteria for offshore supply vessels using illustration D036DG, total below-deck tonnage of 650 tons combined with 140 tons of deck cargo at a 2.5-foot VCG restricts further loading, permitting exactly 83 tons of additional cargo before exceeding maximum allowable moments.