For the latest free software updates excluding map data throughout the life of your, Garmin products | Garmin GPSMAP 525 | Installation Instructions (Page 12)
Garmin GPSMAP 525 | Installation Instructions
Garmin DriveSmart 65 GPS with Traffic Navigator
Marine Device Software Updates | GARMIN
User manual Garmin GPSMAP 525 (English - 72 pages)
Garmin GPSMAP 525 - Marine GPS Receiver Support and Manuals
GPS Devices: How To Download, Install & Update Maps On GPS Devices Guide