Question 23Navigation General

70% to pass

Under the IALA Buoyage Systems, safe water marks may show a _______________.

A composite group-flashing, Fl(2 + 1
B B
C , green light
D quick-flashing, Q(9
AI Explanation

The correct answer is A) composite group-flashing, Fl(2+1). Under the IALA Buoyage System, safe water marks, which indicate safe passage around the mark, typically display a composite group-flashing light characteristic. This means the light will flash in a pattern of two short flashes followed by one longer flash, repeating continuously. The other answer choices do not accurately describe the standard light characteristic for safe water marks.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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