USCG USCG ROR
Set 13 • Question #125 of 475
Launch Interactive Practice Room BOTH INTERNATIONAL & INLAND What is the optional whistle signal which may be sounded by a vessel at anchor?
A
Two prolonged followed by one short blast
B
One short followed by two prolonged blasts
C
One short, one prolonged, followed by one short blast
✓ Correct Answer
D
Four short blasts
USCG NMC Regulatory Explanation
Under Inland Rule 34(a), one short blast indicates 'I intend to leave you on my port side' (port-to-port pass), requiring a confirming one short blast from the other vessel.
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