Free Upgrades for Elite Ti, HDS Carbon, and Gen3. ... See bottom structure in even greater detail and get simpler navigation when you upgrade compatible Lowrance® displays with the new software release. At the heart of the release is FishReveal™How's it work? Do you know if it's available for all Lowrance units? And how do you update? Sorry for all the questions but I didn't know you could update the unit. Thought it was just for the maps. Thanks ?