From Manufacturer
The Horita GR-8 is a Rackmount GPS receiver that works with all HORITA GPS products. The GR-8 has special input filtering for use in "dirty" power situations, such as encountered in aircraft and automobile power systems. The GR-8 simultaneously tracks eight satellites and provides time, date, and position data outputs in both NMEA and TSIP formats, and a 1-PPS output.