Garmin Marine GPS System 18 User Manual

Insert a memory card into the card slot on the computer.  
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Select Download next to “Garmin Marine Network with SD  
card.”  
GMR™ 18/24 xHD Installation  
Instructions  
Read and agree to the terms.  
Select Download.  
Select Run.  
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You can operate this device only with radar-compatible Garmin®  
devices or through a Garmin Marine Network. See your Garmin  
dealer or go to www.garmin.com for more details.  
Select the drive associated with the memory card, and select  
Next > Finish.  
Important Safety Information  
Updating the Device Software  
Before you can update the software, you must obtain a  
software-update memory card or load the latest software onto a  
memory card.  
WARNING  
See the Important Safety and Product Information guide in the  
product box for product warnings and other important  
information.  
Turn on the chartplotter.  
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Insert the memory card into the card slot.  
Follow the on-screen instructions.  
The radar transmits electromagnetic energy. Ensure that the  
radar is installed according to the recommendations in these  
instructions and that all personnel are clear of the path of the  
radar beam before transmitting. When properly installed and  
operated, the use of this radar conforms to the requirements of  
ANSI/IEEE C95.1-1992 Standard for Safety Levels with  
Respect to Human Exposure to Radio Frequency  
Electromagnetic Fields.  
Wait several minutes while the software update process  
completes.  
The device returns to normal operation after the software  
update process is complete.  
Remove the memory card.  
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When the radar is transmitting, do not look directly at the  
antenna at close range; eyes are the most sensitive part of the  
body to electromagnetic energy.  
Mounting Considerations  
To complete the installation, you need the appropriate  
fasteners, tools, and mounts. These items are available at most  
marine dealers.  
When connecting the power cable, do not remove the in-line  
fuse holder. To prevent the possibility of injury or product  
damage caused by fire or overheating, the appropriate fuse  
must be in place as indicated in the product specifications. In  
addition, connecting the power cable without the appropriate  
fuse in place will void the product warranty.  
It is highly recommended that the device is mounted out of  
range of personnel, with the horizontal beam width above  
head height.  
IEC 60936-1, clause 3-27.1, states maximum distances from  
the antenna at which radio frequency (RF) levels can be  
expected:  
CAUTION  
This device should be used only as a navigational aid. Do not  
attempt to use the device for any purpose requiring precise  
measurement of direction, distance, location, or topography.  
18 xHD  
100 W/m squared = 91 cm (36 in.)  
10 W/m squared = 289 cm (114 in.)  
Always wear safety goggles, ear protection, and a dust mask  
when drilling, cutting, or sanding.  
24 xHD  
100 W/m squared = 108 cm (43 in.)  
10 W/m squared = 343 cm (135 in.)  
NOTICE  
When drilling or cutting, always check what is on the opposite  
side of the surface.  
The device should be mounted high above the ship’s keel  
line with minimal blockage between the vessel and the radar  
beam. Obstructions may cause blind and shadow sectors, or  
generate false echoes. The higher the installation position,  
the farther the radome can detect targets.  
Registering Your Device  
Help us better support you by completing our online registration  
today.  
The device should be mounted on a flat surface or a platform  
that is parallel to the vessel's water line and is sturdy enough  
to support the device's weight. The weight for each model is  
listed in the product specifications.  
Keep the original sales receipt, or a photocopy, in a safe  
place.  
Most radar beams spread vertically 12.5° above and 12.5°  
À
below the radome's radiating element. On vessels with  
Á
Contacting Garmin Product Support  
higher bow angles at cruise speed, the installation angle can  
be lowered to point the beam slightly downward to the  
waterline while at rest. Use shims if necessary.  
Go to www.garmin.com/support and click Contact Support  
for in-country support information.  
In the USA, call (913) 397.8200 or (800) 800.1020.  
In the UK, call 0808 2380000.  
In Europe, call +44 (0) 870.8501241.  
Loading the New Software on a Memory  
Card  
The device may contain a software-update memory card. If so,  
follow the instructions provided with the card. If a software  
update memory card is not included, you must copy the  
software update to a memory card.  
November 2013  
190-01656-02_0B  
 
Printed in Taiwan  
If the device is compatible with the Garmin Marine  
Network, connect the network cable to the port labeled  
NETWORK.  
Radar Operation  
All functions of the Garmin radome are controlled with your  
Garmin chartplotter. See the Radar section of your chartplotter's  
manual for operating instructions. To download the latest  
manual, go to www.garmin.com/support/.  
Measuring the Potential Front-of-Boat Offset  
The front-of-boat offset compensates for the physical location of  
the radar scanner on a boat, if the radar scanner does not align  
with the bow-stern axis.  
Using a magnetic compass, take an optical bearing of a  
stationary target located within viewable range.  
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Measure the target bearing on the radar.  
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If the bearing deviation is more than +/- 1°, set the front-of-  
boat offset.  
Setting the Front-of-Boat Offset  
Before you can set the front-of-boat offset, you must measure  
the potential front-of-boat offset.  
Using a torque wrench, tighten the nuts from 13.7 to 18.6 N-  
m (10 to 14 lbf-in.) of force.  
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The front-of-boat offset setting configured for use in one radar  
mode is applied to every other radar mode and to the Radar  
overlay.  
Connecting the Power Cable  
WARNING  
Select Up or Down to adjust the offset.  
When connecting the power cable, do not remove the in-line  
fuse holder. To prevent the possibility of injury or product  
damage caused by fire or overheating, the appropriate fuse  
must be in place as indicated in the product specifications. In  
addition, connecting the power cable without the appropriate  
fuse in place will void the product warranty.  
Specifications  
Specification  
Measurement  
GMR 18 xHD weight  
GMR 24 xHD weight  
Temperature range  
Case material  
7.7 kg (16.95 lb.)  
9.5 kg (20.9 lb.)  
-15 to 70°C (5 to 158°F)  
Thermoplastic resin  
48 RPM  
Route the power cable from the device to the power source.  
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Connect the red wire to the positive (+) battery terminal, and  
connect the black wire to the negative (-) battery terminal.  
Default antenna rotation speed  
If you have not already done so, connect the power cable to  
the device by turning the locking ring clockwise.  
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Alternative antenna rotation speed 24 RPM  
Power input source  
Power output  
10.5 to 35 Vdc, 3.5 A  
Power Cable Extensions  
4 kW peak  
9410 MHz nominal  
1 m (3.28 ft.)  
3.7°  
Connecting the power cable directly to the battery is  
recommended. If it is necessary to extend the cable, the  
appropriate gauge of wire must be used for the length of the  
extension.  
RF transmit frequency  
Compass-safe distance  
GMR 18 xHD beam width  
GMR 24 xHD beam width  
Maximum range  
5.2°  
Distance  
Wire Gauge  
48 nm  
2 m (6.5 ft.)  
4 m (13 ft.)  
6 m (19 ft.)  
16 AWG (1.31 mm²)  
14 AWG (2.08 mm²)  
12 AWG (3.31 mm²)  
Minimum range  
20 m (66 ft.)  
16 m (52.5 ft.)  
Range discrimination  
Range scales  
0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3,  
4, 6, 8, 12, 16, 24, 36, 48 nm  
Connecting to a Device or to the Marine  
Network  
You can connect the radar either directly to a radar-compatible  
Garmin device or to a Garmin Marine Network to share radar  
information with all connected devices.  
Detailed Dimensions  
NOTE: Not all Garmin devices are compatible with the Garmin  
Marine Network. See the installation instructions or owner's  
manual provided with your device for more information.  
Route the network cable to your compatible Garmin device.  
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If you have not already done so, install the locking rings and  
o-rings on the end of the network cable.  
Select an option:  
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Item  
GMR 18 xHD  
GMR 24 xHD  
If the Garmin device is not compatible with the Garmin  
Marine Network, connect the network cable to the port  
labeled RADAR.  
Length  
508.2 mm (20 in.)  
504.7 mm (19 7/8 in.)  
248.3 mm (9 ¾ in.)  
645.4 mm (25 7/16 in.)  
642.5 mm (25 5/16 in.)  
250.3 mm (9 7/8 in.)  
(width)  
À
Á
(height)  
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Status LED Color and Radar Status  
Activity  
Solid red  
The radar is getting ready for use.  
Flashing green  
Flashing orange  
Flashing red  
The radar is operating properly.  
The radar software is being updated.  
The radar has encountered an error. Contact  
Garmin product support for assistance.  
Item  
À
GMR 18 xHD  
233 mm (9 3/16 in.)  
176.7 mm (6 15  
141.5 mm (5 9/16 in.)  
GMR 24 xHD  
233 mm (9 3/16 in.)  
245.4 mm (9 11  
/16 in.)  
141.5 mm (5 9/16 in.)  
258.5 mm (10 3/16 in.)  
207.7 mm (8 3/16 in.)  
141.5 mm (5 9/16 in.)  
/
16 in.)  
Á
Â
190 mm (7 ½ in.)  
Ã
139.2 mm (5 ½ in.)  
141.5 mm (5 9/16 in.)  
227.5 mm (8 15  
Ä
Å
/
16 in.)  
296.2 mm (9 11  
/16 in.)  
Æ
Installation Troubleshooting  
Symptom  
Possible Causes  
The radar does  
not power on (no  
status LED).  
• The power cable may not be connected correctly  
to the device or to the battery. Check all  
connections.  
• The inline fuse may have blown. Check the fuse  
and replace it if necessary.  
• The wire gauge used to extend the power cable  
may be too small for the length of the extension.  
Check the table provided in the Power Cable  
Extensions section of these instructions to make  
sure the correct wire gauge is used.  
The radar is not  
available on the  
Garmin device or  
on devices  
connected to the  
Garmin Marine  
Network.  
• The device software may not be up-to-date.  
Update the software on the device or on the  
Garmin Marine Network.  
• The network cable may not be connected  
correctly to the device or to the Garmin Marine  
Network. Check all connections.  
• If a field-installable network connector was used,  
it may have been installed improperly. Check the  
connector.  
The status LED is located on the product label, and can help  
troubleshoot installation problems.  
Garmin International, Inc.  
1200 East 151st Street  
Garmin® and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. GMRis a  
trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin.  
Olathe, Kansas 66062, USA  
Garmin (Europe) Ltd.  
Liberty House, Hounsdown Business Park  
Southampton, Hampshire, SO40 9LR UK  
Garmin Corporation  
No. 68, Zhangshu 2nd Road, Xizhi Dist.  
New Taipei City, 221, Taiwan (R.O.C.)  
0470  
© 2013 Garmin Ltd. or its subsidiaries  
 

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