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GMR 404/406 Marine Radar Installation Instructions

Radar Setup

To take full advantage of the GMR 404/406 features, the Garmin Marine Network may require a software update. A software update card is 

provided in the Marine Data Management Kit. 
The newly installed GMR 404 or 406 will not transmit until the radar is properly configured. Follow the instructions below to properly 

configure the radar.

Turn on the Garmin Marine Network:

1.  Press the 

Power

 key on the MFD. The scanner turns on with the network. The Welcome Page appears showing that a GMR 404/406 is 

detected as a network connection.

2.  When 

I Agree

 turns yellow, press the 

ENTER

 key.

Configuring the Radar:

1.  From the Map Page, press 

QUIT

 to clear the banner message “Radar Needs Configured” and show the Radar Setup Page.

2.  Using the 

Rocker

, highlight the 

Advanced

 tab, then the 

Antenna Size

 field, and press 

ENTER

.

3.  Select the correct antenna size, 

4 foot

 or 

6 foot

, and press 

ENTER

.

4.  When prompted, press and hold 

FCTN

 to begin radar transmission. Before beginning radar transmission, verify that the area around the 

scanner is clear. Microwave energy can be harmful to humans and animals. While the radar is transmitting, avoid looking directly at the 

scanner. The eyes are the most sensitive part of the body to microwave radiation.

Front of Boat Offset

Depending on the scanner installation, it may be necessary to adjust the Front of Boat Offset. If the scanner installation requires a 180° offset, 

change the Front of Boat Offset to 180° and test the radar. If the Front of Boat Offset needs further adjustment, continue with the procedure 

below.
Using a magnetic compass, take an optical bearing of a stationary target located within viewable range. Measure the target bearing on the radar. 

If the bearing deviation is more than +/- 1°, then do the following to correct the Front of Boat Offset.

To change the Front of Boat Offset:

1.  From the Radar Page, press the 

ADJ

 key to display the Adjustment Menu.

2.   From the Adjustment Menu, select 

Setup,

 and press 

ENTER

. Using the 

Rocker

, select the 

Advanced

 tab.

3.  Using the 

Rocker

, highlight the 

Front of Boat Offset

 slider, and press 

ENTER

.

4.  Press left on the 

Rocker 

to adjust to a negative value, or press right to adjust to a positive value. The preview window changes as you 

adjust the slider.

5.  Once an offset has been determined, press 

ENTER

 to save, then press 

QUIT

 to return to the Radar Page. Your new Garmin Marine 

Radar is now ready to use! Refer to the 

GPSMAP 3206/3210 Owner’s Manual

 for details about operating the radar.

Select Antenna Size

Summary of Contents for GMR 404

Page 1: ...GMR 404 406 marine radar installation instructions...

Page 2: ...electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto provided that such electronic or printed copy of this manual must contain the complete text of thi...

Page 3: ...on link on the Home page Also be sure to record your serial number in the area provided on this page Serial Number Use this area to record the serial number in case it is lost stolen needs service or...

Page 4: ...nner be mounted out of range of personnel horizontal beam width above head height When the scanner is transmitting do not look directly at the antenna at close range because the eyes are the most sens...

Page 5: ...Mounting Template If the end with the hatch is pointed toward the bow the Bearing Offset in the MFD must be set to 180 Figure 4 To mount the scanner 1 Determine a suitable mounting location and tape...

Page 6: ...ring washers The 8 mm bolts should be torqued to 70in lbs 6 ft lbs align waveguide faces To ships power Step Installing the Voltage Converter Unit The voltage converter requires an input voltage of 10...

Page 7: ...deck Avoid running the cable near moving objects high heat sources or through doorways and bilges Avoid installing the cable next to or parallel to other cables such as radio antenna lines or power c...

Page 8: ...d black using the supplied heat shrink crimp connectors DO NOT cut the scanner cable and DO NOT remove the in line fuse located on the scanner power cable After crimping the connections heat the conne...

Page 9: ...xxxxxxxxxxxxxxxxxxxxxx Step Connection the network For a stand alone network MFD and radar only attach the RJ 45 marine network cable to the RJ 45 socket on the back of the MFD For an expanded network...

Page 10: ...ting avoid looking directly at the scanner The eyes are the most sensitive part of the body to microwave radiation Front of Boat Offset Depending on the scanner installation it may be necessary to adj...

Page 11: ...30 dB outside 10 deg of main Vertical Beamwidth 24 degrees Antenna Gain 30 dB Polarization Horizontal Input Return Loss Better than 20 dB Weight 16 lbs 7 3 kg Open Array Scanner Transmit Power 4 kW Tr...

Page 12: ...g Bearing Accuracy 1 degree Range Ring Accuracy 20 meters or 1 5 of range scale whichever is greater Controls Auto Manual Gain Adjust Manual or Auto AFC receiver tuning Manual adjust for Rain Clutter...

Page 13: ...GMR 404 406 Marine Radar Installation Instructions 11 5 91 150 0 5 51 140 0 7 87 200 0 7 87 200 0 L 12 87 326 8 12 34 313 5 17 35 440 8 Model L GMR 404 51 6 1310mm GMR 406 75 7 1923mm...

Page 14: ...on using the simulator mode prior to actual use When in actual use carefully compare indications from the GMR 404 406 to all available navigation sources including the information from other NAVAIDs v...

Page 15: ...NG FROM THE USE MISUSE OR INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT Some states do not allow the exclusion of incidental or consequential damages so the above limitations may not ap...

Page 16: ......

Page 17: ...2 U S A Tel 913 397 8200 Fax 913 397 8282 Garmin Europe Ltd Unit 5 The Quadrangle Abbey Park Industrial Estate Romsey SO51 9AQ U K Tel 44 0870 8501241 Fax 44 0870 8501251 Garmin Corporation No 68 Jang...

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