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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)

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Q: What does one short blast one long blast one short blast mean?
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What do two short horn blast from a vessel mean?

Two short horn blast from a vessel means that she is turning port and one short horn blast that she is turning starboard


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 does one short blast of a horn mean boating?

One short blast of a horn mean while boating may mean a couple of things depending on where you are. Some of the meanings of the short blast include request for drawbridge to open, intention to pass of the left side and intention to change course to starboard among others.


What does one short blast of a horn mean while boating?

One short blast of a horn mean while boating may mean a couple of things depending on where you are. Some of the meanings of the short blast include request for drawbridge to open, intention to pass of the left side and intention to change course to starboard among others.


What does it mean when a motor boat approaches you head-on and sounds one short blast?

InternationalSound and light signalsRule 34 Maneuvering and warning signals(a) -One short blast to mean "I am altering my course to starboard."Inland(a) One short means "I intend to leave you on my port side."


What does one long blast followed by one short blast signal to a river lock attendant?

it means you want to ask to go through the lock


What does one blast of a boat horn mean?

One short blast of a horn mean while boating may mean a couple of things depending on where you are. Some of the meanings of the short blast include request for drawbridge to open, intention to pass of the left side and intention to change course to starboard among others.


What should an operator of one vessel do when he hears a long blast from another vessel?

There is no such thing as a "long blast", it is called a "prolonged" blast lasting between 4-6 seconds.-If you agree with the arrangement you would sound the same signal, then take the necessary steps to effect a safe passing. If there is any doubt though the danger signal of five short needs to be sounded.ETA: Rules of the Road, Rule 34-internationalA.) One Short blast means "I am altering my course to Starboard."Two Short blasts mean "I am altering my course to Port."Rule 34-InlandA.)One short blast means "I intend to leave you on my port side."Two short blasts means " I intend to leave you on my starboard side."


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 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.


You are out in the water in foggy conditions you hear one prolonged blast plus two short blast 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.


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