Exam frequency
80%
Difficulty
4/5
Drill questions
49
Authoritative sources
Every answer on this topic traces back to the public rule corpus below.
Source excerpts
33 CFR §83.27
§ 83.27 § 83.27 Vessels not under command or restricted in their ability to maneuver (Rule 27). (a) A vessel not under command shall exhibit: (i) Two all-round red lights in a vertical line where they can best be seen; (ii) Two balls or similar shapes in a vertical line where they can best be seen; and (iii) When making way through the water, in addition to the lights prescribed in this paragraph, sidelights and a sternlight. (b) A vessel restricted in her ability to maneuver, except a vessel engaged in mine clearance operations, shall exhibit: (i) Three all-round lights in a vertical line where they can best be seen. The highest and lowest of these lights shall be red and the middle light shall be white; (ii) Three shapes in a vertical line where they can best be seen. The highest …
COLREGs Rule 27
COLREGs Rule 27 — Vessels Not Under Command or Restricted in Their Ability to Maneuver (a) A vessel not under command shall exhibit: (i) two all- round red lights in a vertical line where they can best be seen; (ii) two balls or similar shapes in a vertical line where they can best be seen; (iii) when making way through the water, in addition to the lights prescribed in this paragraph, sidelights and a sternlight. Vessel not under command—not making way. Same for Inland. Relationship to the Inland Rules: Inland Rule 27 is word-for-word identical to this rule.
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When is a vessel of less than 12 meters in length required to exhibit the lights prescribed in Rule 27?
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