Great app, almost everything you would need.

I use this app in conjunction with a bad elf blue tooth gps, and my iPad as a chart plotter.

I have tried other nav apps and in the end came back to this one because of its customizability. And ability to integrate other hardware, and maps.

I use it to cruse and race in Mobile Bay.

This app run on a iPad or iPhone should not replace a chart plotter for long distance sailing. But is does make a viable back up system.

Well worth the app cost.

Zizzyishkawiz about iNavX: Marine Navigation, v4.7.2