Navigation General · Light Characteristics
A light described as 'Fl(3) R 10s' would show:
- AThree red flashes in a group, with the full cycle lasting 10 seconds✓ Correct
- BA flashing red light with 3-second eclipses and 10-second flashes
- CThree red flashes per second, repeating every 10 seconds
- DA red light that flashes 3 times during a 10-minute period
Explanation
Fl(3) R 10s = group flashing, 3 flashes per group, red color, 10-second period (the three flashes plus the following darkness together equal 10 seconds).
Authority: 33 CFR 62 (U.S. ATON System)
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