Steveh,

I use Tide Tool 2.2 on a Palm Tungsten and it is brilliantly accurate! I find that it is never more than a few minutes out from the officially published high/low times and usually within .2m or so of published heights. It is so convenient to be able to just glance at my Palm whenever we are having a quick calculate at home as to whether it would be worth going sailing on a particular day, what time we should have family lunch etc. It's much quicker and easier than digging through the tide tables and I have my Palm with me almost always.

Of course my view is that it's worth going sailing at any time