[simmsdp]

Hi,
I was using the Navionics App "Carib&S.America HD" v2.3.1 on the iPad 2 3G, not iNavX.
I have the the waypoints from the iPad and the Garmin 176Cs as I saved them both:
iPad Navionics N19 17.914, W104 50.278
Garmin-MacENC N19 17.91, W104 50.27

The Navionics charts in MacENC plotted me onshore by >1/3 mile when I was anchored in 18' of water. The iPad Navionics charts had me anchored where I thought I should be.

The Chart Manager lists the two charts as follows:
California S - Baja Jan-01-10(901)
Cent America West Jan-05-10(901)

I downloaded these Navionics charts Feb 11, 2011.

I am now in Manzanillo Bay and the MacENC-Navionics charts and the iPad-Navionics charts agree. The two waypoints are:
iPad Navionics N19 06.114, W104 20.688
Garmin-MacENC N19 06.11, W104 20.69

Thanks for your help.