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96
SECTION
B
APPENDIX
Wiring and
Specifications
DGPS corrections are accepted in RTCM-104 v.
2.0 format through the NMEA In (BROWN) har-
ness lead. The GARMIN GBR 21 is the recom-
mended beacon receiver for use with the GPSMAP
235 system. Other receivers with the correct
RTCM format may be used, but may not correctly
display status or allow tuning control from the
sounder unit.
NMEA Supported Sentences
The following formats are supported for connection to up to 3 NMEA devices:
•NMEA 0180/NMEA 0182
•NMEA 0183 version 1.5
Approved sentences--GPBWC, GPGLL, GPRMB, GPRMC, GPXTE, GPVTG, GPWPL,
GPBOD, SDDBT, SDMTW and SDVHW
Proprietary sentences--PGRMM, PGRMZ (alt.) PSLIB (beacon receiver control input)
•NMEA 0183 version 2.0
Approved sentences-GPGGA, GPGLL, GPGSA, GPGSV, GPRMB, GPRMC, GPRTE,
GPWPL, GPBOD, SDDPT, SDMTW, and SDVHW
Proprietary sentences- PGRME (estimated error), PGRMM (map datum)
PGRMZ (altitude), PSLIB (beacon rec. control input)
To interpret the sentences, the NMEA standrad can be purchased at www.nmea.org.
19000138.10A.QXD 11/11/99 8:47 AM Page 96