Under the Rules, the lights prescribed shall be exhibited

Under the Rules, the lights prescribed shall be exhibited

• A. From sunrise to sunset in restricted visibility
• B. Only at night
• C. All times
• D. Never

Answer: (A)

The important idea is that the prescribed navigation lights must be shown whenever visibility is restricted. This rule exists to keep your vessel visible to others in poor visibility, and it applies regardless of whether it’s day or night. Among the options, the one that mentions illumination “in restricted visibility” aligns with this trigger for lighting. The other choices imply lighting at only at night, all times, or never, which don’t match the requirement that restricted visibility (the circumstance) triggers the lights. In practice, you also show lights from sunset to sunrise, in addition to during any period of restricted visibility, to cover the nighttime and poor-visibility conditions.

The important idea is that the prescribed navigation lights must be shown whenever visibility is restricted. This rule exists to keep your vessel visible to others in poor visibility, and it applies regardless of whether it’s day or night. Among the options, the one that mentions illumination “in restricted visibility” aligns with this trigger for lighting. The other choices imply lighting at only at night, all times, or never, which don’t match the requirement that restricted visibility (the circumstance) triggers the lights. In practice, you also show lights from sunset to sunrise, in addition to during any period of restricted visibility, to cover the nighttime and poor-visibility conditions.