You don't need to have an external GPS, if that's what you mean. It will work with our map, which does require a GPS signal from our own (or another connected) GPS.
After the last update 15.4.7 I get no vertical nav information. What menu items do I need to set this up. I have Skyview classic installed about 10 years and got vertical nav set up 1000 over destination airport but no longer get this information
hello everybody , i live in france , and since the last update, march 2021, on my hdx , i don't arrive to have the submenu Vs REQ's , so I can't enable the Vnav , maybe somebody know a solution , thanks so much for your help . Charly