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GR4 GPS Connection Kit
The Humminbird® GR4 GPS Connection Kit includes the following items:
• GR4 GPS Antenna Receiver with 20' (6m) cable
• AS YC("Y") cable for multiple accessory attachment
• Hardware kit for stem or deck mounting
• GR4 GPS Receiver Accessory Manual
NOTE: 10 foot extension cables are available as an optional purchase item. These can be used to extend
the total GR4 Antenna Cable length up to 50 feet.
How GPS Works
Your Matrix Fishing System uses GPS and sonar to determine your position, display it on a grid, and
provide detailed underwater information. The Global Positioning System (GPS) is a satellite
navigation system designed and maintained by the U.S. Department of Defense. GPS was originally
intended for military use; however, civilians may also take advantage of its highly accurate position
capabilities, typically within +/- 10 meters, depending on conditions. This means that 95% of the
time, the GPS receiver will read a location within 10 meters of your actual position. The GR4 GPS
Receiver can use information from WAAS (the Wide Area Augmentation System), EGNOS (the
European Geostationary Navigation Overlay Service), and MSAS (the MTSAT Satellite Augmentation
System) satellites if they are available in your area.
GPS uses a constellation of satellites that continually send radio signals to the earth. Your present
position is determined by receiving signals from up to 12 satellites and measuring the distance from
the satellites.
The following GPS functionality is currently supported by the Matrix Fishing System when it is
connected to a GPS receiver:
• View current position
• View current track (breadcrumb trail)
• View precision speed and heading from your GPS receiver
• Save tracks and waypoints
• Travel a route and navigate from one waypoint to the next.
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Navigation Menu Tab 25
Tracks .................................................................................................................................................................. 25
Waypoints.......................................................................................................................................................... 26
View Orientation.............................................................................................................................................. 26
North Reference................................................................................................................................................ 27
Grid Rotation .................................................................................................................................................... 27
Trackpoint Interval .......................................................................................................................................... 27
Track Min Distance (Advanced).................................................................................................................... 28
Map Datum (Advanced) ................................................................................................................................ 28
Delete All Nav Data (Advanced) .................................................................................................................. 29
Alarms Menu Tab 29
Off Course Alarm ............................................................................................................................................ 29
Arrival Alarm .................................................................................................................................................... 30
Drift Alarm ........................................................................................................................................................ 30
Setup Menu Tab 31
Units - Distance ................................................................................................................................................ 32
Units - Speed .................................................................................................................................................... 32
Triplog Reset .................................................................................................................................................... 32
Local Time Zone (Advanced) ........................................................................................................................ 33
Daylight Savings Time (Advanced).............................................................................................................. 33
Position Format (Advanced).......................................................................................................................... 34
Time Format (Advanced, International Only) .......................................................................................... 34
Date Format (Advanced, International Only) .......................................................................................... 35
NMEA Output (Advanced) ............................................................................................................................ 35
Troubleshooting 36
Fishing System Doesn’t Power Up .............................................................................................................. 36
Fishing System Defaults to Simulator with a Transducer Attached .................................................. 36
Display Problems.............................................................................................................................................. 37
Finding the Cause of Noise............................................................................................................................ 38
Matrix Fishing System Accessories 39
Contact Humminbird® 40
NOTE: Entries in this Table of Contents which list (International Only) are only available on products sold
outside of the US and Canada by our authorized International Distributors. To obtain a list of
authorized International Distributors, please visit our website at www.humminbird.comor contact our
Customer Resource Center at 1-334-687-0503 to locate the distributor nearest you.
NOTE: Entries in this Table of Contents which list (with PC Connect Cable Only) require the purchase of
a separate accessory. You can visit our website at www.humminbird.com to order these accessories
online or contact our Customer Resource Center at 1-334-687-0503.
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