While the handheld Nav-com -using 50 year-old VOR technology -has been around for several decades, no manufacturer (to my knowledge) has yet chosen to release a handheld GPS-com.  Why?  It seems to me that the handheld GPS-com should be easily preferred to the VOR equipped units.  Terrain data, airports, moving map display can easily be condensed (have been for some time now).  None of the relevant software or communication technologies are new.  Is there some complication to combining these technologies?

 

Nearly every active pilot would want a single-unit GPS-com as an electrically independent navigation and communication devise that could be stuffed in the flight bag -assuming the price is affordable.  Many pilots like me have lost VOR navigation skills mostly because GPS has become the norm.  The safety and ease-of-use advantages of GPS moving map are far superior to VOR and this helps to explain why few new VOR units are being purchased by pilots.  What is the holdup in GPS-com development?           Greg Nelson