On Fri, Jul 18, 2008 at 2:00 PM, David Cragg <[EMAIL PROTECTED]> wrote: > If you have been on the Aire and Calder when barges are coming - and they can > come very fast, well above the limit - you know they are coming from the wave > that often arrives well before the boat does. >
Yeah, but does it cause a "tide" - probably not. It's just water moving back and forth, more likely when passing or approaching bridge holes and other constrictions. You can sometimes get the same effects, but smaller, with narrowboats. Still, it's very impressive - the level can alter by a good couple of feet, and the effects start a good 10 minutes before, and finish 10 minutes after the barge has been by. Mike -- Michael Askin http://shoestring_DOT_zapto_DOT_org/
