Short for Global Navigation Satellite System, GLONASS is a Russian satellite-based navigation system that works alongside GPS (Global Positioning System) to provide position information to compatible devices. With an additional 24 satellites to utilize, GLONASS compatible receivers can acquire satellites up to 20% faster than devices that rely on GPS alone.
The following Garmin devices currently support GLONASS:
Turning on GLONASS may require changing the Satellite System setting to GPS+GLONASS from the Setup System page. Reference the owner's manual for instructions on enabling this feature on the device.