Navigation General · Light Characteristics
A light described as 'occulting' is one in which:
- AThe total duration of light in a period is longer than the total darkness (eclipses are brief)✓ Correct
- BThe period of light is shorter than the period of darkness
- CLight and dark are exactly equal
- DThere is no light at all
Explanation
An occulting light is on more than it is off — steady light with brief eclipses. It is the opposite of a flashing light (on less than off) and distinct from isophase (equal light and dark).
Authority: USCG Light List; chart light characteristics
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