I would have tons of reef rash if were not for NAVIONICS BOATING US marine charts apps for the iPhone. I use it every sail and also for fishing, exploring.
You get access to their expensive "Gold" charts package, but it's dirt cheap and useful on phones with larger screens. The iPad version costs more and is best for motor boats and monohulls. You can record, playback and share your 2D tracks.
[/URL]
If you want to noodle with 3D, RACEQ's makes a tracking app that will display your recorded tracks on a virtual 3D earth map, allowing you to fly around the boat as it sails around. It's designed for regatta races and is a little flukey, but fun to play with.
--
Prindle 18
96734
--