Garmin Alpha Maps & BirdsEye

The handhelds read a microSD card, so you can add Garmin TOPO or HuntView map products without filling the internal memory. HuntView adds landowner and hunt-unit detail that plain TOPO does not. Insert the card, and the maps appear in the map menu. Card size depends on how much map data you load; a mid-size card covers most needs on the 100, 200i and 300.

BirdsEye is Garmin's downloadable satellite imagery. On current handhelds you can download it over the device; otherwise pull it through Garmin Express and sync. It overlays aerial detail on the map, which helps read cover and terrain while tracking. If maps do not appear after loading, the fixes are on the troubleshooting page, and map updates run through the same route as the software update.