The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (Transit). Although winds are less than 70 knots, excessive motion requires 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 will be the new margin on the maximum allowable KG?
Official USCG Answer & Rule Citation
Correct Answer: Option A — 7.08 feet
Applying stability criteria and tank sounding corrections from the sample load form shows that adding 4087 long tons of ballast with free surface effects results in a newly calculated allowable KG margin of 7.08 feet.
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