"Gary" wrote in message
news:l54zg.277400$Mn5.102305@pd7tw3no...

My original point was that the terms "one or two whistle pass" is not
commonly used by mariners around the world. It might not be clearly
understood. It may work when dealing with tug boats and pilots in a
particular area of the US but it is not a good way to learn to indicate
intentions if you venture a little farther from home. It wouldn't work
here in the Pacific Northwest.

I'm not disagreeing with your point about "around the world" rather
explaining that you do hear it frequently in US waters.
The main reason it works and is used here is the Inland Rules and how
passing situation signals are set up. What is important, is not the fact
that you don't hear it used in your area, but that if you are travelling to
other areas of the States, you may well hear the terms being used and if you
know that you are not as apt to wonder what's going on.


As far as channels monitored for intership and passing arrangements, I
monitor the correct ones as dictated by the local the Vessel Traffic
Management System (VTMS), where ever I am. It is the law. If the pilots
and tugs are on a separate working channel using their own version of
slang, then it just doesn't matter to those of us driving ships.
Presumably, if they were making arrangements with me, they would be on the
proper designated channel, using the proper terminology and monitored by
the local VTMS.

Not all Ports/harbors have VTS. Whenever you are in an unfamiliar area VTS
will be a great first choice but you need to be aware that it may not be
available and some local slang/channels may be in effect especially if you
are "driving ships". Although proper terminology is great, it's not always
used.

otn