USCG Exam Practice · Light List, ranges, and light characteristics
A Fixed and Flashing (FFl) light is best described as which of the following?
- AA light that alternates between a fixed colour and a flashing colour
- BA continuous light with a brighter flash superimposed at intervals✓ correct
- CA light with equal periods of steady light and darkness
- DA group flashing light with a fixed background glow between groups
Why B is correct
FFl denotes a fixed light with a brighter flash superimposed at intervals. It is used on certain channel-edge structures and should not be confused with alternating or group flashing characteristics. Light List — light-characteristic (FFl).
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