"Jeff Morris" jeffmo@NoSpam-sv-lokiDOTcom wrote in message
...
Well put, Scotty.

But MC does have a point - under the US system you have to check to see if
the current
tide is much higher than MHW; in other countries where the datum for
bridge clearance is
the Spring Tide level, or the Large Tides, its a bit easier.

However the best thing to do is to read the gauge board on the bridge and
ask the
tender.Can

Hmmmm.... You assume that every overhead obstruction has a guage!

I suspect that "busier" waterways have guages, but most of the rivers that I
have gone up, have not had such useful aids to navigation. I need to read
the charts!

Regards


Donal


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