Thanks for a great program! I admire programmers that write elegant programs that solve the problem, while still keeping things simple and minimalistic. That said, here are some suggestions for more code :-)

I have started converting sea charts to "google format" so I can keep track of my shipmates from my bunk. Works like a charm besides the obvious projection issues, but as long as I dont go too far north, the difference between mercator and gaussian isn't too bad. I'm not planning on using the N770 for any critical navigational decisions anyway.

After playing with google maps for a while, I noticed that the gps position often has a systematic error in some direction. It would be useful to be able to "nudge" the map to some known reference point (a suggestion would be by dragging the waypoint or gps dot to the reference point or something - similar to Atlas for the Palmpilot). The gui looks to be the easy part however, since the systematic error seems to be different depending on zoom-level and depending on where you are. Problem is, how do you store and reuse the calibration - and worst of all - how do you keep things lightweight. Still, it would be a nice feature, and one that coincidentally would help me fix my projection issues somewhat. ;-)

On the information pane you're considering, would it be possible to include the lat/lon coordinates for the currently shown map center? It would make it possible to verify some rough validity of any homegrown map without having to actually go there.