I recently have and used the new Navionic (2007) charts with the Raymarine
C70 plotter. All tidal and current stations for my area are listed and
functioning well.
Check the navionic site for you area.

"Brian D. Lawrence" wrote in message
...
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?