Which light characteristic is specifically noted as being used on certain channel-edge structures?

A. Alternating (Al)
B. Group Flashing — 4 (Fl(4))
✓ Fixed and Flashing (FFl)Correct
D. Occulting (Oc)

Why C is correct

Fixed and Flashing (FFl) is a fixed light with a brighter flash superimposed at intervals, and the Light List specifically notes its use on certain channel-edge structures. (Light List — FFl)

Cited:Light List — light-characteristic(FFl)

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Which light characteristic is specifically noted as being used on c… — USCG Exam Practice · CaptainsGround