ok. I was using a 76 missing the cutoff date for buying more 76 Blue Charts.
The 76 did not load Blue Charts and Topo USA from the NEW Blue Charts designed for the 78 on the 76 with a 2007 Topo USA.
The 78 loads both 2007 USA and 2014 Blue Charts on the micro card. Or so Garmin Support tells me.
Call Garmin, ask about the downloader. Or email.
With a kayak what happened first landing was the Blue Charts got me there but when I landed I didn't know where I was.
I tried loading both but the procedure was 'problematic' as Garmin and it was, I blew out the Blue charts info.