CATALOG INDEX
BY ALPHABETICAL
ORDER

CATALOG INDEX
BY DEPARTMENT

For more info:
mailto:JSi@jsits.com

[ CMT Alto-G12 ]
[ CMT CogoCad ]
[ CMT Contour and
Volume for Windows ]
[ CMT GPS Base Station ]
[ CMT HP-GPS-L4 ]
[ CMT March ]
[ CMT MC GPS ]
[ CMT PC5L-GPS ]
[ CMT PC-GPS 3.2
for Windows ]
[ CMT GPS-REC-CR,
12-channel High
Precision Base Station ]
[ CMT Winbase ]
[ CMT Z33 Dual-frequency
GPS ]
[ GARMIN GBR 21 ]
[ GARMIN GPS II ]
[ GARMIN GPS II Plus ]
[ GARMIN GPS III ]
[ GARMIN GPS 12 ]
[ GARMIN GPS 48 ]
[ GARMIN GPSCom 170 ]
[ GARMIN GPSmap 130 ]
[ GARMIN GPSMAP 175 ]
[ GARMIN GPSMAP
210 & 220  ]
[ GARMIN GPSmap
235 Sounder ]

GBR 21 Discover the precision of Differencial GPS with the new GARMIN GBR 21. The GBR 21 receives Selective Availability and atmospheric corrections for GARMIN GPS units so you can take full advantage of 5-10 meter GPS accuracy.

Whether you're navigating through a crowded channel, finding your way to an important fishing spot or pinpointing a specific dive location, the GBR 21 can help you hit the spot time and again. Designed for convenient remote mounting, the GBR 21 is controlled right from your Differential-Ready GPS receiver with simple key commands.

Differential GPS corrections are broascast by United States Coast Guard and IALA (Internationnal Association of Lighthouse Authorities) beacons free of charge to mariners. These signals provide information on satellite status and health in addition to the location, frequency and status of the beacon transmitter. The GBR 21 quickly decodes this information for use by your GARMIN GPS receiver, correcting for Selective Availability and atmospheric errors.

The GARMIN GBR 21 gives you access to the most accurate from of GPS navigation, with potential for 5-meter precision. The GARMIN GBR 21 even includes a handy reference card listing both active and planned beacons, noting their position and frequency.

Signal / Data progressing :

• Frequency
  823.5 - 325 KHz
• Demodulation
  MSK (Minimum Shift Keying)
• MSK Bit Rates
  25, 50, 100, 200
  Selectable at GPS receiver
• Data Format
  RTCM 104 version 2.0, RS-232,
  6 to 8 format, 4800/9600 baud
• Remote Tuning
  Via auxiliary page menu on GARMIN marine GPS receivers
  (GPS 38, 40, 45, 120, 130, 135, 210, 220)

Antenna Requirements :

• Rec. Antenna
  Shakespeare 4' loran whip Model 173 (not included)
• Ant. Coupler
  1.6" base diameter
  0.6" top diameter
  4.8" height
• Coupler cable
  30' RG-58 coaxial

Power / Physical Specifications :

The GARMIN GBR 21 is controlled from an on/off power switch (not included). The receiver may be mounted remotely, but a location that allows easy viewing of the LED status light is reommended.

• Size
  5.2"L x 3.6"W x 1.5"H (13.2 x 9.1 x 3.8 cm)
• Weight
  6.8 ounces (193g)
• Voltage
  10-18vDC
• Current draw
  130ma

LED Status Indicator :

• Off
  Power to receiver off
• Flashing
  Power to receiver on
• Constant
  Power on, receiving data