Navionics has an app for iPhones, iPads, etc (through the apple store) and an app for android phones and tablets as well (through the google
store). If you are trying to use the app on a laptop it will not work since support for it was discontinued.
We used Navionics throughout the Bahamas
on our Android tablet (as well as the Navionics chip in our chartplotter) and it worked wonderfully. We downloaded the section of the chart that we needed next as we moved along the chain (you can download as much as you want but may be limited by the storage
on your device).
By far, the app was the best investment we made on our trip. We lost electrical
when we were approaching Rum
Cay which, as you may know, is fraught with coral
heads that are just below the surface. We HAD to have an accurate chart and RIGHT NOW!! Thankfully we had our tablet ready to go and the chart downloaded as well. We didn't have 10 seconds without a chartplotter
because we seamlessly switched from the chartplotter
that had lost
power to the tablet.
, having a backup GPS can be the difference in having a nice dinner on deck
anchored safely in a calm anchorage and being grounded on a coral head
taking on water