Exam frequency
55%
Difficulty
2/5
Drill questions
66
Authoritative sources
Every answer on this topic traces back to the public rule corpus below.
Source excerpts
33 CFR §83.32
§ 83.32 § 83.32 Definitions (Rule 32). (a) The wordmeans any sound signaling appliance capable of producing the prescribed blasts and which complies with specifications in Annex III to these Rules (33 CFR part 86). (b) The termmeans a blast of about 1 second's duration. (c) The termmeans a blast of from 4 to 6 seconds' duration.
33 CFR §83.33
§ 83.33 § 83.33 Equipment for sound signals (Rule 33). (a) A vessel of 12 meters or more in length shall be provided with a whistle, a vessel of 20 meters or more in length shall be provided with a bell in addition to a whistle, and a vessel of 100 meters or more in length shall, in addition, be provided with a gong, the tone and sound of which cannot be confused with that of the bell. The whistle, bell and gong shall comply with the specifications in Annex III to these Rules (33 CFR part 86). The bell or gong or both may be replaced by other equipment having the same respective sound characteristics, provided that manual sounding of the prescribed signals shall always be possible. (b) A vessel of less than 12 meters in length shall not be obliged to carry the sound signaling appliances …
33 CFR §83.35
§ 83.35 § 83.35 Sound signals in restricted visibility (Rule 35). In or near an area of restricted visibility, whether by day or night, the signals prescribed in this Rule shall be used as follows: (a) A power-driven vessel making way through the water shall sound, at intervals of not more than 2 minutes, one prolonged blast. (b) A power-driven vessel underway but stopped and making no way through the water shall sound, at intervals of not more than 2 minutes, two prolonged blasts in succession, with an interval of about 2 seconds between them. (c) A vessel not under command; a vessel restricted in her ability to maneuver, whether underway or at anchor; a sailing vessel; a vessel engaged in fishing, whether underway or at anchor; and a vessel engaged in towing or pushing another vessel…
COLREGs Rule 32
COLREGs Rule 32 — Definitions (a) The word “whistle” means any sound signaling appliance capable of producing the prescribed blasts and which complies with the specifications in Annex Ill to these Regulations. (b) The term “short blast” means a blast of about one second’s duration. (c) The term “prolonged blast” means a blast of from four to six seconds’ duration. Relationship to the Inland Rules: Inland Rule 32 differs from this rule — compare against 33 CFR 83.32 before answering a question that turns on which set applies.
COLREGs Rule 33
COLREGs Rule 33 — Equipment for Sound Signals (a) A vessel of 12 meters or more in length shall be provided with a whistle, a vessel of 20 meters or more in length shall be provided with a bell in addition to a whistle, and a vessel of 100 meters or more in length shall, in addition, be provided with a gong, the tone and sound of which cannot be confused with that of the bell. The whistle, bell and gong shall comply with the specifications in Annex lIl to these Regulations. The bell or gong or both may be replaced by other equipment having the same respective sound characteristics, provided that manual sounding of the prescribed signals shall always be possible. (b) A vessel of less than 12 meters in length shall not be obliged to carry the sound signaling appliances prescribed in paragra…
COLREGs Rule 34
COLREGs Rule 34 — Maneuvering and Warning Signals (a) When vessels are in sight of one another, a power-driven vessel underway, when maneuvering as authorized or required by these Rules, shall indicate that maneuver by the following signals on her whistle: − one short blast to mean “I am altering my course to starboard”; − two short blasts to mean “I am altering my course to port”; − three short blasts to mean “I am operating astern propulsion”. (b) Any vessel may supplement the whistle signals prescribed in paragraph (a) of this Rule by light signals, repeated as appropriate, while the maneuver is being carried out: (i) these light signals shall have the following significance: − one flash to mean “I am altering my course to starboard”; − two flashes to mean “I am altering my course to p…
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A power-driven vessel is underway but stopped and making no way through the water in an area of restricted visibility. Which sound signal is required under the Inland Rules?
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