You have 420 tons of below deck tonnage and 150 tons of above deck cargo on board. You must load 135 tons of liquid mud below deck. How much more deck cargo can you load? See illustration D036DG below.

Correct Answer: Option A — 90 tons

Evaluating cargo limitations via stability illustration D036DG requires balancing total deadweight and vertical moments against maximum allowable limits. Accounting for 420 tons below deck, existing deck cargo, and 135 tons of liquid mud restricts additional deck cargo loading to 90 tons.