Garmin 18 Manuale Utente

Using a torque wrench, tighten the nuts from 13.7 to 18.6 N-

m (10 to 14 lbf-in.) of force.

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.

Route the power cable from the device to the power source.

Connect the red wire to the positive (+) battery terminal, and 

connect the black wire to the negative (-) battery terminal.

If you have not already done so, connect the power cable to 

the device by turning the locking ring clockwise.

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.

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)

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.

Route the network cable to your compatible Garmin device.

If you have not already done so, install the locking rings and 

o-rings on the end of the network cable.

Select 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.

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 

.

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.

Measure the target bearing on the radar.

If the bearing deviation is more than +/- 1°, set 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.

Select Up or Down to adjust the offset.

GMR 18 xHD weight

7.7 kg (16.95 lb.)

GMR 24 xHD weight

9.5 kg (20.9 lb.)

Temperature range

-15 to 70°C (5 to 158°F)

Case material

Thermoplastic resin

Default antenna rotation speed

48 RPM

Alternative antenna rotation speed 24 RPM
Power input source

10.5 to 35 Vdc, 3.5 A

Power output

4 kW peak

RF transmit frequency

9410 MHz nominal

Compass-safe distance

1 m (3.28 ft.)

GMR 18 xHD beam width

3.7°

GMR 24 xHD beam width

5.2°

Maximum range

48 nm

Minimum range

20 m (66 ft.)

Range discrimination

16 m (52.5 ft.)

Range scales

0.125, 0.25, 0.5, 0.75, 1, 1.5, 2, 3, 
4, 6, 8, 12, 16, 24, 36, 48 nm

Length

508.2 mm (20 in.)

645.4 mm (25 

7

/

16

 in.)

À

 (width)

504.7 mm (19 

7

/

8

 in.)

642.5 mm (25 

5

/

16

 in.)

Á

 (height)

248.3 mm (9 ¾ in.)

250.3 mm (9 

7

/

8

 in.)

3