Ok but interface needs work
The app works ok. The interface is built more from the perspective of marine gps units rather than a full blown iPad device.
The CHS charts should knit together so that you can continuously scroll over all your charts.
There should be 1 finger zoom in and out buttons because on the boat you often have something in your hand like a fishing rod or you want to zoom in/out while navigating. Having to use two fingers to pinch zoom in/out is annoying.
The edit of a waypoint uses this tiny popup window. You have an iPad screen. Use it. The editing does not even auto capitalize sentences. This is a standard iPad interface feature expected by users.
Fix these things and think more in terms of iPad and it deserves another star.
MontegoStar about
iNavX: Marine Navigation, v3.4.1