It's been quite a while since I used PC Planner, so I hope I'm remembering this correctly. I had a "User Card" that was blank initially that I used to save the routes and waypoints that I created on my laptop
using PC Planner. I could transfer them back and forth to/from my laptop
, of course, and then load them into the chartplotter
by inserting the card in one of the two slots. I believe that there needed to be a C-MAP
Nt+ chart card in the second slot to make it work.
I never tried to load non C-MAP charts onto the User Card, but I suspect they wouldn't be readable on the RL70. I had an RL70 CRC, and there were a limited number of chart "brands" that were compatible.