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Internal SBAS receiver
The GPS124 includes a SBAS (WAAS/EGNOS/MSAS) receiver.
By using SBAS you can achieve precise position.
RAIM function
The accuracy of position fixes is self-tested by the GPS124. (RAIM function)
This function assures higher reliability to the position fix than conventional method.
12-Channel Parallel for Receiving 12 Satellites Simultaneously
The GPS 124 is designed to simultaneously receive signals from 12 orbiting satellites, ensuring the most accurate positioning.
IEC61162-1, NMEA0183 Output
Since the output data is changeable between IEC61162-1 (NMEA0183 version 2.3), NMEA version 1.5 and 2.1, you can connect the GPS124 to various Marine Electronics Equipment such as Marine Radars, Fishfinders, Plotters, or others.


GPS Specifications
Receiver type Multichannel (12-CH, SBAS 1-CH) all-in-view
Frequency 1575.42MHz ± 1MHz (C/A code)
Sensitivity -135dBm for acquisition, -138dBm for tracking
Accuracy 30m 2DRMS (C/A code, HDOP<=4, SA OFF)
7m 2DRMS when SBAS corrected
Time to first fix Typically 40 seconds (cold start fix)
Typically 33 seconds (warm start fix)
Position update Normally every 1 second


DGPS input RTCM SC-104 ver. 2.0 type 1, 2, 7, 9 available
Data output Signal output port, TTL level
IEC61162-1 (NMEA0183 ver. 2.3), NMEA0183 ver. 1.5 or 2.1 selectableIEC61162-1 (ver2.3) GGA, RMC, VTG, ZDA, DTM, GBS, GNS
ver1.5 GGA, RMC, GLL, VTG
ver2.1 GGA, RMC, GLL, VTG, DTM
Geodetic datum 46 (WGS-84, WGS-72, Japan, America, Canada / Alaska, Europe, Australia, England, NAD-83, other 37 selectable)
Input voltage
(Power Consumption)
12/24 VDC +30%, -10% (less than 1.5W)
Data cable 10m
Operating temperature -25°C to 70°C
Water proof USCG CFR-46/IEC60945




No. Name Type Q’ty Remarks
1 GPS Receiver JLR-4340 1 includes 10m cable
2 Instruction manual 1