John...Tide Tool
I've had Tide Tool loaded for a few months, now. It is an amazing piece of software. I checked the accuracy against internet tide charts from Newport to the Canadian border and is never deviated more that 2 minutes.Last week my wife and I took a car trip along the Maine coast and I had the PDA with me. I was amazed how accurate it was (both time AND tide height) at the different locations that I was driving.