On Wed, 12 Sep 2007 08:19:43 -0700, Brian D. Lawrence wrote:

I sail the Columbia River. I would like to find a chart plotter that
has chart tables that cover the tidal influence - which runs all the way
to Portland Oregon. I don't NEED it I WANT it.

I currently have a Garmin GPSMAP 492C. The last tide station it
displays in Knappa Slough, Oregon side. PC based programs seem to have
many more prediction points - as far east a Bonneville Dam.

Garmin has responded to questions but only with the answer that "the
eastern most tide station and prediction is Knappa Slough."

Any input?

We use a Tidefinder, a handheld electronic tide calculator with more tide
and current locations than anything else I've seen. I haven't been able
to find it anywhere on the web except here (scroll to the bottom of the
page):

http://www.eavtech.com.au/broadcast_...s_conex_1.html


I think it's made in Bellingham, WA. It's well worth tracking down.

Matt O.