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One prolonged blast means a sound signal of between 4 and 6 seconds. By itself it to notify other users of the presence of a vessel that is manoeuvring.
Leaving a dock or if obscured by something for instance.
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∙ 13y ago
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What does one prolonged blast from the horn of another vessel mean?
The Vessel is turning to Starboard .
What is one possible mean of a single prolonged blast of a horn?
In the maritime environment, it mean several things: 1. In restricted visibility it means the vessel is making way through the water. 2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
What does 1 prolonged blast and 2 short blast of boat whistle mean?
Runaway ship
What does one prolonged blast plus one short blast signal to a river lock attendant in a boat?
Vessel operators can alert the lock attendant of their request to transit through the lock by sounding one prolonged blast followed by one short blast
What should you do if you hear one prolonged blast?
Stay out of the way! One prolonged blast is the whistle signal for a ship leaving a berth or in a blind bend in a channel.
What is one possible meaning of a single prolonged blast of a horn?
In the maritime environment, it mean several things: 1. In restricted visibility it means the vessel is making way through the water. 2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
What is one possible meaning of a prolonged blast of a horn?
In the maritime environment, it mean several things: 1. In restricted visibility it means the vessel is making way through the water. 2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
What is one meaning of a single prolonged blast of a horn?
In the maritime environment, it mean several things: 1. In restricted visibility it means the vessel is making way through the water. 2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
What is a possible meaning of a single prolonged blast of horn?
In the maritime environment, it mean several things: 1. In restricted visibility it means the vessel is making way through the water. 2. A vessel approaching a blind bend in a river can sound one prolonged blast on the ships' whistle to alert any other vessels to its presence, if another vessel is nearby then they will respond with one prolonged blast on the ships' whistle.
You are out on the water in foggy conditions. You hear one prolonged blast plus two short blasts every two minutes. What does this sound signal mean?
The sound signals that it is a sailing vessel underway when you hear one prolonged blast plus two short blasts every two minutes.
During foggy conditions what does one prolonged blast every two minutes mean?
Foggy conditions....a case of restricted visibility... according to International Regulations for Preventing Collision at Sea Rule 35... "A Power driven vessel making way through the water shall sound at intervals of not more than 2 minutes one prolonged blast." So hearing a prolonged blast every 2 mins in restricted visibility we can deduce that its a power driven vessel making way through water.
What sound alerts others that a vessel is leaving the dock?
one prolonged blast
