Garmin GMR 18 XHD User manual

GMR™18 XHD/24 XHD/18 HD+
INSTALLATION
INSTRUCTIONS
Important Safety Information
WARNING
Failure to follow these warnings, cautions, and notices could result in personal
injury, damage to the vessel or device, or poor product performance.
See the Important Safety and Product Information guide in the product box for
product warnings and other important information.
The radar transmits electromagnetic energy. To avoid possible personal injury,
damage to the vessel or device, or poor product performance, 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.
To avoid possible personal injury, do not look directly at the antenna at close
range when the radar is transmitting. Eyes are the most sensitive part of the
body to electromagnetic energy.
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 voids the product warranty.
CAUTION
This device should be used only as a navigational aid. Using the device for
any purpose requiring precise measurement or direction, distance, location, or
topography may result in personal injury or damage to the vessel.
To avoid possible personal injury, always wear safety goggles, ear protection,
and a dust mask when drilling, cutting, or sanding.
Opening the device may result in personal injury and/or damage to the device.
This device contains no user-serviceable parts, and should be opened only by
a Garmin® authorized service technician. Any damage resulting from opening
the unit by anyone other than a Garmin authorized service technician will not
be covered by the Garmin warranty.
NOTICE
When drilling or cutting, always check what is on the opposite side of the
surface to avoid damaging the vessel.
Software Update
You may need to update the device and chartplotter software when you install
this device. See your Garmin chartplotter owner's manual for the full software-
update instructions.
Tools Needed
• Drill
• 9.5 mm (3/8 in.) drill bit
• 32 mm (1 1/4 in.) drill bit (optional)
• 4 mm (13/32 in.) hex wrench
• 13 mm (1/2 in.) wrench and torque wrench
• Marine sealant
Mounting Considerations
To complete the installation, you need the appropriate fasteners, tools, and
mounts. These items are available at most marine dealers.
• It is highly recommended that the device is mounted out of range of
personnel, with the horizontal beam width above head height. To avoid
exposure to harmful radio frequency (RF) levels, the device should not be
mounted closer to people than the maximum safe distance value listed in
the product specifications.
• 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.
• 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.
• Most radar beams spread vertically 12.5° above and 12.5° below
the radome's radiating element. On vessels with 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.
• The radome has two mounting options when installed on a standard
marine mount. One mounting option is closer to the center of the radome
, and the second option is offset towards the back to move the radar
further away from the mast.
• The device should be mounted away from heat sources such as smoke
stacks and lights.
• The device should be mounted at a different level than horizontal
spreaders and mast crosstrees.
• To avoid interference with a magnetic compass, the device should not be
mounted closer to a compass than the compass-safe distance value listed
in the product specifications.
• Other electronics and cables should be mounted more than 2 m (6 ½ ft.)
from the radar beam path.
• GPS antennas should be either above or below the radar beam path.
• The device should be mounted at least 1 m (40 in.) from any transmitting
equipment.
TA-2013/1848
2302
Printed in Taiwan
May 2020
190-02105-90_0B

• The device should be mounted at least 1 m (40 in.) away from cables
carrying radio signals such as VHF radios, cables, and antennas.
For Single Side Band (SSB) radios, increase the distance to 2 m (6 ½ ft.).
Mounting the Radar
Before you mount the radar, you must review the mounting location
considerations and select a mounting location.
NOTE: The supplied M8 x 1.25 x 60 threaded rods can be used on mounting
thicknesses of 5 to 30 mm (3/16 to 1 3/16 in.) (recommended). For surfaces over
30 mm (1 3/16 in.), use longer threaded rods.
1If you are not installing the device on a pre-drilled Garmin-compatible radar
mount, use the included mounting template to drill four 9.5 mm (3/8 in.)
mounting holes.
2Install the locking ring and o-ring on the end of the Garmin Marine Network
cable.
3Connect the power cable to the power port and the network cable to the
network port .
4Press the cables into any of the guide grooves on the bottom of the
case, and secure them using a cable hold-down plate .
The cables should be bent or twisted as little as possible.
5Position the radome on the mounting surface with the triangular mark on
the case aligned to the front of the vessel.
6Apply the included anti-seize compound to the threads of the four
M8 x 1.25 x 60 threaded rods.
7Insert the four threaded rods into the mounting holes on the bottom of the
radome.
Up to 50 mm (2 in.) of the threaded rods may extend below the radome.
8Apply a bead of marine sealant on the mounting surface around each
mounting hole.
9Fasten the radome to the mounting surface using the threaded rods
, flat washers , spring washers , and hex nuts .
10 Using a torque wrench, tighten the nuts from 13.7 to 18.6 N-m (10 to
14 lbf-in.) of force.
Cable Considerations
It may be necessary to drill 32 mm (11/4) in. holes for routing the power or
network cables.
• When routing both the power and network cables through the same hole,
you must route the network cable before the power cable.
• You must apply marine sealant to the hole after the cables are in place to
ensure a waterproof seal.
If the routing hole must be made in a visible location, decorative cable
grommets can be purchased from Garmin or a Garmin dealer (optional).
• If needed, the grommet can be trimmed to enable you to route both the
network and the power cable through the same hole.
• The optional grommet does NOT provide a waterproof seal. You must
apply marine sealant to the grommet after the cables are in place to ensure
a waterproof seal.
When installing the network and power cables, you should observe these
considerations.
• Cutting the Garmin Marine Network cable is not recommended, but a field
install kit can be purchased from Garmin or a Garmin dealer if cutting the
network cable is necessary.
• To ensure safety, appropriate tie-wraps, fasteners, and sealant should be
used to secure the cable along the route and through any bulkheads or the
deck.
• Cables should not be run near moving objects and high-heat sources or
through doorways and bilges.
• To avoid interference with other equipment, network and power cables
should not be run next to or parallel to other cables, such as radio antenna
lines or power cables. If this is not possible, the cables should be shielded
with metal conduit or a form of EMI shielding.
• The power cable should be installed as close to the battery source as
possible.
◦ If it is necessary to extend the power cable, the appropriate gauge of
wire must be used (Power Cable Extensions, page 3).
◦ Incorrectly extended runs of cable may cause the radar to malfunction
due to insufficient power transmission.
Connecting the Power Cable
WARNING
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 voids the product warranty.
2

1Route the power cable from the device to the power source.
2Connect the red wire to the positive (+) battery terminal, and connect the
black wire to the negative (-) battery terminal.
3If you have not already done so, connect the power cable to the device by
turning the locking ring clockwise.
Power Cable Extensions
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.
Distance Wire Gauge
2 m (6.5 ft.) 16 AWG (1.31 mm²)
4 m (13 ft.) 14 AWG (2.08 mm²)
6 m (19 ft.) 12 AWG (3.31 mm²)
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.
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.
1Route the network cable to your compatible Garmin device.
2If you have not already done so, install the locking rings and o-rings on the
end of the network cable.
3Select an option:
• If the Garmin device is not compatible with the Garmin Marine Network,
connect the network cable to the port labeled RADAR.
• If the device is compatible with the Garmin Marine Network, connect
the network cable to the port labeled NETWORK.
Radar Operation
All functions of this radar are controlled with your Garmin chartplotter. See the
Radar section of your chartplotter's owner's manual for operating instructions.
To download the latest manual, go to support.garmin.com.
If you have more than one radar on your boat, you must be viewing the radar
screen for the radar you want to configure.
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.
1Using a magnetic compass, take an optical bearing of a stationary target
located within viewable range.
2Measure the target bearing on the radar.
3If 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.
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.
1From a Radar screen or the Radar overlay, select Menu > Radar Setup >
Installation > Front of Boat.
2Select Up or Down to adjust the offset.
Specifications
GMR 18 xHD/18 HD+ weight 7.7 kg (16.95 lb.)
GMR 24 xHD weight 9.5 kg (20.9 lb.)
Temperature range From -15 to 70°C (from 5 to 158°F)
Case material Thermoplastic resin
Maximum antenna rotation speed
GMR 18/24 xHD
48 RPM
Maximum antenna rotation speed GMR 18 HD+ 24 RPM
Power input source From 11 to 35 Vdc, 3.5 A
Fuse 7.5 A
Power output 4 kW peak
RF transmit frequency 9410 MHz nominal
GMR 18 HD+ and 18 xHD beam width 5.2 degrees
GMR 24 xHD beam width 3.7 degrees
Maximum range GMR 18/24 xHD 48 nm
Maximum range GMR 18 HD+ 36 nm
Minimum range 20 m (66 ft.)
Range discrimination 16 m (52.5 ft.)
Compass-safe distance 1 m (3.28 ft.)
Minimum Safe Operating Distance
When it is transmitting, the radar should be located in a position on the vessel
that is at least this far from people. IEC 60936-1, clause 3-27.1, specifies the
maximum distances from the antenna at which radio frequency (RF) levels can
be expected.
These minimum safe distances apply for a transmitting radar with a rotating
antenna, and are much larger when the antenna is not rotating. If rotation of
the antenna is obstructed for any reason, the transmitter will automatically turn
off.
Model 100 W/m² 50 W/m² 10 W/m²
GMR 18 xHD/18 HD
+
0.08 m (3.15 in.) 0.11 m (4.33 in.) 0.25 m (9.84 in.)
GMR 24 xHD 0.08 m (3.15 in.) 0.11 m (4.33 in.) 0.24 m (9.45 in.)
Detailed Dimensions
Item GMR 18 xHD/18 HD+ GMR 24 xHD
Length 508.2 mm (20 in.) 645.4 mm (25 7/16 in.)
(width) 504.7 mm (19 7/8 in.) 642.5 mm (25 5/16 in.)
(height) 248.3 mm (9 ¾ in.) 250.3 mm (9 7/8 in.)
3

Item GMR 18 xHD/18 HD+ GMR 24 xHD
233 mm (9 3/16 in.) 233 mm (9 3/16 in.)
176.7 mm (6 15/16 in.) 245.4 mm (9 11/16 in.)
141.5 mm (5 9/16 in.) 141.5 mm (5 9/16 in.)
190 mm (7 ½ in.) 258.5 mm (10 3/16 in.)
139.2 mm (5 ½ in.) 207.7 mm (8 3/16 in.)
141.5 mm (5 9/16 in.) 141.5 mm (5 9/16 in.)
227.5 mm (8 15/16 in.) 296.2 mm (9 11/16 in.)
Open-Source Software License
To view the open-source software license(s) used in this product, go to
developer.garmin.com/open-source/linux/.
Installation Troubleshooting
Symptom Possible Causes
The radar does not
turn on. The status
LED is not on.
• 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
(Power Cable Extensions, page 3).
The radar is not
available on the
Garmin device or on
devices connected
to the Garmin
Marine Network.
• The radar may not be powering on. Check the status LED.
• 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.
Status LED Color and
Activity
Radar Status
Solid red The radar is getting ready for use. The LED should be solid
red briefly and change to flashing green.
Flashing green The radar is operating properly.
Flashing orange The radar software is being updated.
Flashing red The radar has encountered an error. Contact Garmin product
support for assistance.
Contacting Garmin Support
• Go to support.garmin.com for help and information, such as product
manuals, frequently asked questions, videos, and customer support.
• In the USA, call 913-397-8200 or 1-800-800-1020.
• In the UK, call 0808 238 0000.
• In Europe, call [phone].
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