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Two short horn blast from a vessel means that she is turning port and one short horn blast that she is turning starboard
Depending on which side they intend to pass you on, they should give you and audible horn blast. One blast indicates passing on the starboard and tow blasts indicate passing on the port. Remember to return the same audible horn signal to let them know that you heard them and are aware of their intentions. One blast from them gets one blast from you and so on. The vessel being passed will remain the Stand - on vessel, which means you do not alter your course or speed. They, being the Give-way vessel must alter speed and course to pass.
It means "I am altering my course to starboard"
"I am about to turn to starboard".
That you are crossing starboard to starboard or overtaking to port side. (you are passing on YOUR starboard side)
They intend to pass starboard side to starboard side.
The Vessel is turning to Starboard .
I intend to pass you on my starboard (right) side.
Depending on which side they intend to pass you on, they should give you and audible horn blast. One blast indicates passing on the starboard and tow blasts indicate passing on the port. Remember to return the same audible horn signal to let them know that you heard them and are aware of their intentions. One blast from them gets one blast from you and so on. The vessel being passed will remain the Stand - on vessel, which means you do not alter your course or speed. They, being the Give-way vessel must alter speed and course to pass.
Depending on which side they intend to pass you on, they should give you and audible horn blast. One blast indicates passing on the starboard and tow blasts indicate passing on the port. Remember to return the same audible horn signal to let them know that you heard them and are aware of their intentions. One blast from them gets one blast from you and so on. The vessel being passed will remain the Stand - on vessel, which means you do not alter your course or speed. They, being the Give-way vessel must alter speed and course to pass.
Depending on which side they intend to pass you on, they should give you and audible horn blast. One blast indicates passing on the starboard and tow blasts indicate passing on the port. Remember to return the same audible horn signal to let them know that you heard them and are aware of their intentions. One blast from them gets one blast from you and so on. The vessel being passed will remain the Stand - on vessel, which means you do not alter your course or speed. They, being the Give-way vessel must alter speed and course to pass.
Passing on your starboard (right) side.