I intend to pass you on my port (left) side.
It means I intend to LEAVE you on my port side. That means you will be overtaking the vessel you are approaching (which is the stand on vessel and has the right away) and leaving it on YOUR port side. Simply put you are over taking the vessel and maneuvering to your right. If you are passing from behind and the other vessel is in agreement they will sound the same sound, one short blast. To pass on the opposite side leaving them on your starboard side then you will sound two short blasts. If in agreement you will hear two short blasts in return.
I intend to pass you on my port (left) side.
It means I intend to LEAVE you on my port side. That means you will be overtaking the vessel you are approaching (which is the stand on vessel and has the right away) and leaving it on YOUR port side. Simply put you are over taking the vessel and maneuvering to your right. If you are passing from behind and the other vessel is in agreement they will sound the same sound, one short blast. To pass on the opposite side leaving them on your starboard side then you will sound two short blasts. If in agreement you will hear two short blasts in return.
Don't know what it means, but five short blasts from the hoRN must be a warning of some kind?
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.
it is the same right
Passing on your starboard (right) side.
I intend to pass you on my starboard (right) side.
Means it's about to turn to port.
It is the "Masters Salute", a salute to the Master of another vessel.
5 short blasts is a signal warning of imminent danger (or disagreement).
Five short horn blasts from another boat on the water usually means danger. It could mean they have doubt in the message they had received from you, whether they did not hear it or did not understand. It can also be used to signal that the boat driver is confused about who has the right away. It is a signal to alert another vessel that you are unsure of its intentions, or doubt whether you are taking enough action to avoid a collision.
Three short blasts tell other boaters, “I am operating astern propulsion.” For some vessels, this tells other boaters, “I am backing up.”
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.