USCG Exam Practice · Rule 25 — Sailing and Rowing Vessels (lights)
A sailing vessel of 18 meters in length is underway at night. What is the minimum visibility range required for its sternlight under the Inland Rules?
- A3 miles
- B1 mile
- C2 miles✓ correct
- D5 miles
Why C is correct
33 CFR §83.22(b)(iii) prescribes a minimum visibility of 2 miles for a sternlight on a vessel of 12 meters or more in length but less than 50 meters. An 18-meter sailing vessel falls within this category. The 3-mile range applies to vessels of 50 meters or more, and 1 mile applies to sidelights on vessels under 12 meters.
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