Six blasts of a ship's horn does not seem to have a meaning. Five blasts will mean that you are possibly too close to another ship.
Get The Bleep Out Of The Way.
it is the same right
I intend to pass you on my starboard (right) side.
Passing on your starboard (right) side.
Means it's about to turn to port.
Three short blasts tell other boaters, “I am operating astern propulsion.” For some vessels, this tells other boaters, “I am backing up.”
Don't know what it means, but five short blasts from the hoRN must be a warning of some kind?
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.
They intend to pass starboard side to starboard side.
It is called a short salute and is how ships greet each other.
That you are crossing starboard to starboard or overtaking to port side. (you are passing on YOUR starboard side)