NASBLA Standard: 2.1
Resource: Federal Requirements and Safety Tips p.11
Course Location: p. 5Which of the following is a feature of a Type IV PFD?
there is a dangerous situation
Two short horn blast from a vessel means that she is turning port and one short horn blast that she is turning starboard
Three short blasts of a boat horn typically indicate that a vessel is operating in a constrained situation or is uncertain of another vessel's intentions. It can also signal that the boat is about to back up or is making a maneuver that may not be clear to nearby vessels. This sound is a part of maritime signaling to enhance navigation safety.
Five short blasts from a vessel typically signal a warning or indicate that the vessel is unsure of another vessel's intentions or position. This sound is often used in situations of limited visibility or when navigating in close quarters to communicate caution. It can also be a request for the other vessel to clarify their actions or maneuvers. In general, it's a call for increased awareness among nearby vessels.
They intend to pass starboard side to starboard side.
Rules of the Road.Rule 35InternationalSound Signals in Restricted visibility.(c) A vessel not under command, a vessel restricted in her ability to maneuver, a vessel constrained by her draft, a sailing vessel, a vessel engaged in fishing, and a vessel engaged in towing or pushing another vessel shall, instead of the signals prescribed in paragraphs (a) or (b) of this rule, sound at intervals of not more than two minutes three blast in succession, namely one prolonged followed by two short blast.
To indicate that you want to pass another vessel on your starboard side, you should sound one short blast on your horn or whistle. This sound signal communicates your intention to the other vessel, allowing them to understand your maneuver and adjust their course if necessary. It's essential to follow this convention for safe navigation and to avoid potential collisions.
Rules of the RoadSound and light signalsRule 34Maneuvering and Warning SignalsInternational (Signals of Action)(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".Inland (Signals of intent)(a) When a power driven vessels are in sight of one another and meeting or crossing at a distance within half a mile of each other, each vessel underway, when maneuvering as authorized or required by these rules:(i) Shall indicate that maneuver by the following signals on her whistle: one short blast to mean "I intend to leave you on my port side" (turning to starboard.); two short blast to mean "I intend to leave you on my starboard" (turning to port); and three short blasts to mean "I am operating astern propulsion"(This is the ONLY action in Inland)
Rules of the Road. Rule 35, Sound Signals in Restricted Visibility. (C) A vessel not under command, a vessel restricted in her ability to maneuver, a vessel constrained by her draft, a sailing vessel, a vessel engaged in fishing, and a vessel engaged in towing or pushing another vessel SHALL, sound at intervals of not more than two minutes three blast in succession, namely one prolonged followed by two short blast.
Three short blasts from a vessel's horn typically indicate that the vessel is operating in reverse. This signal is used to communicate the vessel's intentions to other nearby boats and ensure safe navigation in crowded or narrow waterways. It's important for maintaining awareness and preventing accidents among vessels in close proximity.
One prolonged and two short blasts is 'D' in Morse signals. It is a signal to be used in restricted visibility by a vessel not under command[NUC], a vessel restricted in her ability to manoeuvre[RAM], a vessel constrained by her draught, a sailing vessel, a vessel engaged in fishing and a vessel engaged in towing or pushing another vessel.
Rules of the RoadSound and light signalsRule 34Maneuvering and Warning SignalsInternational (Signals of Action)(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".Inland (Signals of intent)(a) When a power driven vessels are in sight of one another and meeting or crossing at a distance within half a mile of each other, each vessel underway, when maneuvering as authorized or required by these rules:(i) Shall indicate that maneuver by the following signals on her whistle: one short blast to mean "I intend to leave you on my port side" (turning to starboard.); two short blast to mean "I intend to leave you on my starboard" (turning to port); and three short blasts to mean "I am operating astern propulsion"(This is the ONLY action in Inland)