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Runaway ship
"I am about to turn to starboard".
When two boats approach each other, they use horn blasts to signal the other about their intentions when it comes to moving to avoid collision. 5 short blasts indicates that the signaling boat is unsure about what the other boat is doing.
three short blast
Regatta
One short blast of a boats horn can mean a couple of things.Horns are used to communicate with other boats to avoid collisions.If you are overtaking a boat from the rear, one short blast will let the other boat know that you are going to pass them on the starboard side, two blasts indicate passing on the port side. The other boat should return your one blast, or two blasts, to let you know that they are aware of you and acknowledge your intentions.If you are heading straight towards another vessel, one blast will indicate you intentions of passing port to port. If you pass starboard to starboard then two blasts are required. The last situation is if you are going to be crossing in front of another boat. Remember, the boat coming from the right has the right of way. Giving one blast lets the boat to your right know that you see them and are going to give way to them, again all these signals should be acknowledged by the other vessel. If you do not receive a return signal, assume they are either drunk or do not see you. These rules are for inland waters, such as lakes rivers, bays, harbors and the like. Different rules may apply when you are on the high seas.One short blast of a boat horn means that the boat is altering course in a starboard direction. One long blast means that the boat is nearing a bend and cannot see oncoming boats.
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
The danger signal
It means a vessel is going to back up.
one short blast your taking boat-ed.com cheater!
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.
A boat is using astern propulsion and is in the act of backing up.