What is the correct interpretation of the flag hoist F 2 1 3 second substitute?
Official USCG Answer & Rule Citation
Correct Answer: Option D — F2131
The second substitute repeats the second flag of a hoist. In "F 2 1 3 second substitute," the second flag is the numeral 2, making the final decoded sequence "F2132" per International Code of Signals standard operating procedures.
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