On Fri, Jul 18, 2008 at 7:37 PM, Ron Jones <[EMAIL PROTECTED]> wrote: > Mack, David wrote: >> >> Adrian added >>> The "tide" effect is quite different. It is a long-lasting (and >>> increasing) rise in the water level of a long length of >>> waterway ahead of oncoming traffic, which can occur in >>> unusual circumstances as described in the quote above. It is >>> not a wave at all. > More likely that most boats are relativity shallow these days, leaving > enough room underneath for the water to flow back. You are not going to > move 30 tons of water with a propeller in 70ft... The amount the prop moves > is negligible to the amount of water that is needed to be moved. >
Empty day boats don't draw much either though Ron. I think the main difference is that they were being pulled from the bank. Mike -- Michael Askin http://shoestring_DOT_zapto_DOT_org/
