Much to my surprise and dismay, I found that the present C Map NT card in my Furuno chartplotter stopped mapping at the southern end of Earnest Sound and showed nothing further south. So, I have been shopping for an additional card that shows Ketchikan and all of Prince of Wales.

I have also been reading about the new C Map NT+ cards that are supposed to show more bottom detail but again can not find anything specific about what these cards show.

If anyone can help direct me to the correct card, it would be greatly appreciated.