4 ms·Also, WAAS https://www8.garmin.com/aboutGPS/waas.html https://www8.garmin.com/aboutGPS/waas.htmlby seanp2k2 5y agoAlso, WAAS https://www8.garmin.com/aboutGPS/waas.html https://www8.garmin.com/aboutGPS/waas.html