Line "P" in the illustration is the __________. Illustration MO-0126

USCG Exam Illustration MO-0126
USCG Examination Diagram: Illustration MO-0126
Official USCG Answer & Rule Citation

Correct Answer: Option B — propeller curve

Line P represents the theoretical propeller demand curve, illustrating the cubic relationship between engine power output and propeller shaft speed under varying operational conditions.

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