Built to take advantage of the GLONASS system/constellation of satellites as well as standard GPS.
The Garmin GA38 GPS Antenna is a robust external antenna is packaged in a low-profile waterproof housing and provides 3 easy mounting solutions: pole, surface or under-deck (for the underside of fiberglass decks).
The GA 38 GPS/GLONASS antenna provides increased flexibility and installation options as well as the potential for enhanced reception of GPS/GLONASS signals for compatible Garmin chartplotters and combo chartplotter/sounders.
Compatible with most ‘non networking’ Garmin GPS devices. e.g. GPSMap 450(s), 451(s), 550(s), 551(s), 555(s), 556(s), 557(xs), 750(s), 751(xs), 820(xs), 1020(xs), 158, 158i, 292, 298.