Speckwick - you asked about the Humminbird GPS problem...

I'll do my best, it may or not be a big deal to you, just depends how picky
you are about stuff. First, the things ARE accurate, if you are really for
real on top of something and mark a point, those are good, legitimate
coordinates - the fun comes in when you try to get back over top of
that spot again after moving off of it. You know, you have a icon on
the screen showing the boat, and one showing your waypoint - well,
sometimes it's just the devil to steer one onto top of the other

The problem is the rate or frequency with which the screen redraws
or refreshes. It's easy just with the trolling motor to come in so fast on
a waypoint that you get out ahead of the GPS, it lags behind.
Me personally, I've got about used to it - I know when I get about "so close"
to a waypoint to stop and do something like get rods out or whatever...
give it a few seconds and it will catch up. The boat will almost come to a
stop, but the cursor will keep moving, showing you still closing in on the
waypoint. If you don't wait, when you show on top of the point and stop,
you turn your head then look back, and now you're showing 50 or 100' on
PAST the waypoint.

Some other folks don't like the way the pointer responds to direction changes,
but that doesn't really bother me. I do believe this is due to the same
problem (slowness) though.

On a side note, I haven't heard for sure, but I'm still holding out hope
that they already fixed this on the 798??? Waiting on someone who's
had exp. with both units to say.