Thanks for the comments and
advice - much appreciated. I will follow-up with C-Map if I can contact them. It seems that they have split from Jeppeson and have not yet sorted out their
phone lines. Reaching them by
phone from
Canada has not been possible. They ignore
email contact via their online "contact us" mechanism on the C-Map website.
I recently purchased a C-Map card for the
South Pacific and I have asked the dealer that
sold it to me the same question as I posted on this site. Sadly, they don't know but plan to ask C-Map. I'll ask the dealer to ask C-Map about a compatibility plan for OpenCPN.
Thanks again.