I bought it while back and my lake is listed as HD. First I cant tell any difference with or without it.
Today when I removed card and reinstalled a window comes up with several options That sitting here
cant remember. One was something like copy to maps. second under menu on on charts maps hd shows
but I don't see ultra anywhere? Third I did about a month ago find and set lake level offset but now cant find it?
Possum Kingdom lake Texas