Rule 30 — Anchored and Aground (lights)
Appears on 65% of examsDifficulty 3/557 drill questions
On the paperQ100 / Q30050 questions90% to pass, 5 wrong allowed
Authoritative sources#
Every answer on this topic traces back to the public rule corpus below.
Source excerpts#
33 CFR §82.5
Lights for moored vessels. For the purposes of Rule 30 of the 72 COLREGS, a vessel at anchor includes a barge made fast to one or more mooring buoys or other similar device attached to the sea or river floor. Such a barge may be lighted as a vessel at anchor in accordance with Rule 30, or may be lighted on the corners in accordance with 33 CFR 83.30(h) through (l). [CGD 94-011, 63 FR 5731, Feb. 4, 1998, as amended by USCG-2015-0433, 80 FR 44280, July 27, 2015; USCG-2016-0498, 82 FR 35080, July 28, 2017]
33 CFR §83.30
Vessels anchored, aground and moored barges (Rule 30). (a) A vessel at anchor shall exhibit where it can best be seen: (i) In the fore part, an all-round white light or one ball; (ii) At or near the stern and at a lower level than the light prescribed in paragraph (i) of this Rule, an all-round white light. (b) A vessel of less than 50 meters in length may exhibit an all-round white light where it can best be seen instead of the lights prescribed in paragraph (a) of this Rule. (c) A vessel at anchor may, and a vessel of 100 meters or more in length shall, also use the available working or equivalent lights to illuminate her decks. (d) A vessel aground shall exhibit the lights prescribed in paragraph (a) or (b) of this Rule and in addition, if practicable, where they can best be seen:…
COLREGs Rule 30
Anchored Vessels and Vessels Aground (a) A vessel at anchor shall exhibit where it can best be seen: (i) in the fore part, an all-round white light or one ball; (ii) at or near the stern and at a lower level than the light prescribed in subparagraph (i), an all-round white light. (b) A vessel of less than 50 meters in length may exhibit an all-round white light where it can best be seen instead of the lights prescribed in paragraph (a) of this Rule. (c) A vessel at anchor may, and a vessel of 100 meters and more in length shall, also use the available working or equivalent lights to illuminate her decks. Vessel at anchor—less than 50 meters in length. Same for Inland. (d) A vessel aground shall exhibit the lights prescribed in paragraph (a) or (b) of this Rule and in addition, where they …
COLREGs Rule 30(a)
Anchored Vessels and Vessels Aground (a) A vessel at anchor shall exhibit where it can best be seen: (i) in the fore part, an all-round white light or one ball; (ii) at or near the stern and at a lower level than the light prescribed in subparagraph (i), an all-round white light. Relationship to the Inland Rules: Inland Rule 30 differs from this rule — compare against 33 CFR 83.30 before answering a question that turns on which set applies.
COLREGs Rule 30(b)
Anchored Vessels and Vessels Aground (b) A vessel of less than 50 meters in length may exhibit an all-round white light where it can best be seen instead of the lights prescribed in paragraph (a) of this Rule. Relationship to the Inland Rules: Inland Rule 30 differs from this rule — compare against 33 CFR 83.30 before answering a question that turns on which set applies.
COLREGs Rule 30(c)
Anchored Vessels and Vessels Aground (c) A vessel at anchor may, and a vessel of 100 meters and more in length shall, also use the available working or equivalent lights to illuminate her decks. Vessel at anchor—less than 50 meters in length. Same for Inland. Relationship to the Inland Rules: Inland Rule 30 differs from this rule — compare against 33 CFR 83.30 before answering a question that turns on which set applies.
Practice this topic#
One real exam question on this topic, cited to source. No sign-up.
Under both the International and Inland Rules, lights shall be exhibited from ______.
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The full lesson covers this topic with citation popovers, and there are 57 drill questions behind it.
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