Garmin GPS II Owner's Manual page 94

APPENDIX C
Specifications and Wiring (cont.)
The NMEA 0183 version 2.0 interface format is
supported by the GPS II, and enables the unit to drive
three NMEA devices:
NMEA 0183 version 2.0
Approved sentences:
GPGGA, GPGLL, GPGSA, GPGSV, GPRMB,
GPRMC, GPRTE, GPWPL, GPBOD
Proprietary sentences:
PGRME(estimated error), PGRMM (map
datum),
PGRMZ (altitude), PSLIB (beacon receiver con-
trol)
88
DGPS corrections are accepted on RTCM-104
v. 2.0 format. The GARMIN GBR 21 is the rec-
ommended beacon receiver for use with the
GPS II. Other receivers with the correct RTCM
format may be used, but may not correctly
display status or allow tuning control.