The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Weather conditions require ballasting to survival draft. Assume that 4087 long tons of ballast are added at an average VCG of 8.32 feet, and upon arrival at 45 feet, port and starboard ballast tanks 1, 3, and 8 are slack. What is the new KGL?
Official USCG Answer & Rule Citation
Correct Answer: Option C — 55.16 feet
Ballasting a semi-submersible to survival draft alters displacement and centers of gravity. Integrating added ballast weight, vertical centers, and free surface corrections from slack tanks 1, 3, and 8 yields a new corrected KGL of 55.16 feet.
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