A non-symmetrical tank aboard a MODU contains 390 tons of ballast at a VCG of 9.85 feet. Ballast weighing 250 tons and a VCG of 12.0 feet is discharged. The vertical moments for the remaining ballast is __________.

Correct Answer: Option A — 842 ft-long tons

Calculating remaining vertical moments involves subtracting discharged moments from initial moments. Initial moments (390t × 9.85ft = 3,841.5 ft-tons) minus discharged moments (250t × 12.0ft = 3,000 ft-tons) yields 841.5 ft-tons, rounding to 842 ft-long tons.