Exam frequency
85%
Difficulty
3/5
Drill questions
66
Authoritative sources
Every answer on this topic traces back to the public rule corpus below.
Source excerpts
33 CFR §83.08
§ 83.08 § 83.08 Action to avoid collision (Rule 8). (a) Any action taken to avoid collision shall be taken in accordance with the Rules of this subpart (Rules 4-19) (§§ 83.04 through 83.19) and shall, if the circumstances of the case admit, be positive, made in ample time and with due regard to the observance of good seamanship. (b) Any alteration of course and/or speed to avoid collision shall, if the circumstances of the case admit, be large enough to be readily apparent to another vessel observing visually or by radar; a succession of small alterations of course and/or speed should be avoided. (c) If there is sufficient sea room, alteration of course alone may be the most effective action to avoid a close-quarters situation provided that it is made in good time, is substantial and do…
33 CFR §83.18
§ 83.18 § 83.18 Responsibilities between vessels (Rule 18). Except where Rules 9, 10, and 13 (§§ 83.09, 83.10, and 83.13) otherwise require: (a) A power-driven vessel underway shall keep out of the way of: (i) A vessel not under command; (ii) A vessel restricted in her ability to maneuver; (iii) A vessel engaged in fishing; (iv) A sailing vessel. (b) A sailing vessel underway shall keep out of the way of: (i) A vessel not under command; (ii) A vessel restricted in her ability to maneuver; and (iii) A vessel engaged in fishing. (c) A vessel engaged in fishing when underway shall, so far as possible, keep out of the way of: (i) A vessel not under command; and (ii) A vessel restricted in her ability to maneuver. (d) [Reserved] (e) A seaplane on the water shall, in general, keep…
COLREGs Rule 11
COLREGs Rule 11 — Application Rules in this section apply to vessels in sight of one another. Relationship to the Inland Rules: Inland Rule 11 differs from this rule — compare against 33 CFR 83.11 before answering a question that turns on which set applies.
COLREGs Rule 12
COLREGs Rule 12 — Sailing Vessels (a) When two sailing vessels are approaching one another, so as to involve risk of collision, one of them shall keep out of the way of the other as follows: (i) when each has the wind on a different side, the vessel which has the wind on the port side shall keep out of the way of the other; (ii) when both have the wind on the same side, the vessel which is to windward shall keep out of the way of the vessel which is to leeward; (iii) if a vessel with the wind on the port side sees a vessel to windward and cannot determine with certainty whether the other vessel has the wind on the port or on the starboard side, she shall keep out of the way of the other. (b) For the purposes of this Rule the windward side shall be deemed to be the side opposite to that on…
COLREGs Rule 15
COLREGs Rule 15 — Crossing Situation When two power-driven vessels are crossing so as to involve risk of collision, the vessel which has the other on her own starboard side shall keep out of the way and shall, if the circumstances of the case admit, avoid crossing ahead of the other vessel. Relationship to the Inland Rules: Inland Rule 15 differs from this rule — compare against 33 CFR 83.15 before answering a question that turns on which set applies.
COLREGs Rule 16
COLREGs Rule 16 — Action by Give-way Vessel Every vessel which is directed to keep out of the way of another vessel shall, so far as possible, take early and substantial action to keep well clear. Relationship to the Inland Rules: Inland Rule 16 is word-for-word identical to this rule.
Drill this topic
Can you pick the right answer under pressure?
Try a sample question
If necessary to allow more time to assess a developing situation, a vessel shall ______.
No sign-up needed.
Practice this rule
Sign in to drill 66 questions and read the full lesson with citation popovers.