USCG USCG ROR
Set 14 • Question #165 of 475
Launch Interactive Practice Room BOTH INTERNATIONAL & INLAND The whistle signal for a vessel operating astern propulsion is __________.
A
one long blast
B
one prolonged blast
C
three short blasts
✓ Correct Answer
D
four or more short blasts
USCG NMC Regulatory Explanation
COLREGS Rule 34(a) and 33 CFR 83.34(a) establish that three short blasts on the whistle indicate that a power-driven vessel is operating astern propulsion, ensuring clear auditory communication of reverse movement.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...