I have a Simrad NSS12 Chartplotter and own the Navionics Platinum Plus US Southeast and N Bahamas (906P+) chart pack. No issues with use on the boat and doing updates to the SD card using either the PC or phone/tablet.

I can make and save routes on the PC (Navionics’ site, Chart Viewer) and sync/view/edit them on the phone/tablet in the Navionics Boating HD app. I can edit the routes on the phone/tablet and it will sync to the PC.

I have the Boating HD app, but can’t load my Platinum Plus chart pack. The only charts available are the Government and Navionics 'basic' chart. Neither of which really have the fidelity to do route planning or even navigate safely (IMHO). From what I can tell, the only way you can load a Navionics' chart is to use the Navionics + app? My worry is that if I purchase the Navionics + app, I’d still have to ‘buy’ charts to use on the app. Am I correct? Or can I ‘load’ my Platinum Plus chart pack - I’m guessing not, since the charts I see listed in Navionics + don’t include the chart pack I own.

One last thing - how can I transfer the routes I make on the PC/phone/tablet to the chart SD card so I can use them on the boat’s chartplotter.

Thanks in advance.