While drilling loaded as shown in Sample Load Form Number 4 (Drilling), the DEEP DRILLER suffers an unexpected but slowly increasing port and aft inclination. The wind and waves are light. This inclination could have been caused by __________.
Official USCG Answer & Rule Citation
Correct Answer: Option A — ballast tanks equalizing into tank 10P
A gradual port and aft inclination under calm environmental conditions indicates progressive internal fluid transfer. Ballast tanks slowly equalizing into tank 10P introduce unmonitored moments of weight, altering the vessel's trim and heel over time.
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