USCG USCG ROR
Set 2 • Question #246 of 475
Launch Interactive Practice Room INTERNATIONAL ONLY Which signal may be sounded ONLY by vessels in restricted visibility?
A
At least five short and rapid blasts
B
Four short blasts
✓ Correct Answer
C
One prolonged, one short, one prolonged, and one short blast, in that order
D
Two short blasts
USCG NMC Regulatory Explanation
Under International Regulations for Preventing Collisions at Sea (COLREGS), for the condition where 'Which signal may be sounded ONLY by vessels in restricted visibility', the correct requirement is: 'Four short blasts'. This standard ensures clear navigational intent and collision avoidance.
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