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One prolonged followed by one short is NOT a signal defined by International Regulations for Preventing Collisions at Sea, 1972 (72COLREGS). Unless you are are leaving a dock or berth (one prolonged) then immediately arranging a port to port passage. Unless that is the case there is no such thing as 1 prolonged followed by 1 short.
It means that the vessel is at anchor.
The International Regulations on the Prevention of Collision at Sea (COLREGS)
Rule 35: (g)(f) A vessel at anchor shall at intervals of not more than one minute ring the bell rapidly for about 5 seconds. In a vessel of 100 meters or more in length the bell shall be sounded rapidly for about 5 seconds in the forepart of the vessel and immediately after the ringing of the bell the gong shall be sounded rapidly for about 5 seconds in the after part of the vessel. A vessel at anchor may in addition sound three blasts in succession, namely one short, one prolonged and one short blast, to give warning of her position and of the possibility of collision to an approaching vessel.
Rules of the Road. Rule 35-International
Sound Signals in Restricted Visibility
(f) A vessel at anchor shall at intervals of not more than one minute ring the bell rapidly for about 5 seconds. In a vessel of 100 meters or more in length the bell shall be sounded in the forepart of the vessel and immediately after the ringing of the bell the gong shall be sounded rapidly for about 5 seconds in the after part of the vessel. A vessel at anchor may in addition sound three blast in succession, namely one short, one prolonged, one short, to give warning of her position and of the possibility of collision to an approaching vessel.
*There is no long blast, it is "prolonged" and is 4-6 seconds.
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.
coming in to port
The above answer is incorrect.
The sound signal short-long-short is an optional, additional signal made by a vessel at anchor in restricted visibility. The signal may be made by such a vessel in addition to her required sound signal to give warning of her position and of the possibility of collision to an approaching vessel.
Collision Regulations 35(g)
a vessel is restricted in maneouverability and is in area of low visibility
The above answer is incorrect.
Two long - one short is a signal made by a vessel in sight of another in a narrow channel or fairway; it indicates her intention to overtake on the starboard side of the overtaken vessel.
Collision Regulations 34(c)(i)
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What do three short blasts of a horn mean in boating?
it is the same right
What do two short blasts of a boat horn mean?
Passing on your right side.Signals are (number of blasts):1. Passing you on your left (port) side2. Passing you on your right (starboard) side3. I am moving backwards (astern)4. Danger, don't do that (answer to the other three if dangerous)One short blast means 'I am changing course to starboard.'Two short blasts mean 'I am changing course to port.'Three short blasts mean 'I am operating astern.'Two prolonged blasts followed by one short blast to mean 'I intend to overtake you on your starboard side';Two prolonged blasts followed by two short blasts to mean 'I intend to over-take you on your port side.'A long blast every two minutes is used when operating in fog.
What does 3 long and 2 short blasts mean from a great lakes ship?
Well, honey, three long blasts followed by two short blasts from a Great Lakes ship means they're backing up, just like your ex trying to come back into your life after they realize they messed up. So, keep your distance and let that ship do its thing before it ends up in hot water.
3 short blasts of a horn mean on a boat?
Three short blasts tell other boaters, “I am operating astern propulsion.” For some vessels, this tells other boaters, “I am backing up.”
What does 3 short blast of a horn mean when boating?
Three short blasts means you are operating in reverse. One prolonged blast followed by 3 short blasts means boat under tow in redcued visibility conditions.
What does three horn blasts mean?
A. Three long blast of the ships whistle or general alarm at an interval of three, means a man overboard. This is dismissed by three short whistle blast. B. Three Short blast can also be Rule 34 (Inland and International) "Maneuvering and Warning Signals." Three short blast means "I am operating astern propulsion."
What does one long blast followed by two short blasts from a lake freighter mean?
It is called a short salute and is how ships greet each other.
What do five or more blasts mean when you are boating?
5 short blasts is a signal warning of imminent danger (or disagreement).
What do two short blasts mean?
Two short blasts mean that one intends to overtake the other on the port side. One short blast, on the other hand, means that one intends to overtake the other on the starboard side.
What do 2 short blasts mean on a boat?
passing on the port side from behind
What do two short blasts on a boat's horn mean?
Passing on your starboard (right) side.
Two short horn blasts from a vessel mean what?
Means it's about to turn to port.
