Safety & Environmental Protection (Deck) USCG Question #2306 (Set 71)

The SS AMERICAN MARINER arrived in port with drafts of: FWD 19'-06.6", AFT 20'-05.6". Cargo was loaded and discharged as indicated in table ST-0079 below. Use sheet 2 in the white pages of The Stability Data Reference book to determine the final drafts.

Official USCG Answer & Rule Citation

Correct Answer: Option B — FWD 20'-06", AFT 21'-02"

Longitudinal stability and trim change determinations require applying cargo weight moments from table ST-0079 to the vessel's hydrostatic curves. Correctly accounting for the distance between cargo centers and the ship's center of flotation results in final drafts of FWD 20'-06" and AFT 21'-02".

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