Garmin GMR 18 User Manual

GMR 18

marine radar

installation instructions

© 2007 Garmin Ltd. or its subsidiaries

Garmin International, Inc.
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Welcome

Thank you for choosing the Garmin GMR 18. The GMR 18 utilizes the performance of Garmin radar and provides overlay and color
information when combined with a Garmin marine multi-function display (MFD).

Product Registration

Help us better support you by completing our online registration today! Connect to our Web site at www.garmin.com/registration/.

Use this area to record the serial number (8-digit number located on the bottom of the GMR 18) in case your GMR 18 needs service. Keep the
original sales receipt, or a photocopy, in a safe place.

Serial Number: ___ ___ ___ ___ ___ ___ ___ __

Contact Garmin

Contact Garmin if you have any questions while using your GMR 18. In the USA contact Garmin Product Support by phone:
[phone] or [phone], Monday–Friday, 8 AM–5 PM Central Time; or go to www.garmin.com/support/, and click Product
Support.

In Europe, contact Garmin (Europe) Ltd. at +44 (0) 870.8501241 (outside the UK) or 0808 2380000 (within the UK).

NOTE: The Garmin GMR 18 has no user-serviceable parts. If you encounter a problem with your unit, please take it to an authorized Garmin

NMEA dealer or contact Garmin Product Support for repairs.

Packing List

Before installing and getting started with your unit, please check to see that your package includes the following items. If any parts are

missing, please contact your Garmin dealer immediately.

Standard Package:

• GMR 18 radar unit

• Power—marine network cable

• Mount kit hardware

• Grommet for marine cable

GMR 18 Marine Radar Installation Instructions

1

InstallatIon

Scanner Installation

The following section covers the installation and setup of the GMR 18 marine radar. The GMR 18 only operates with components of the
Garmin Marine Network, and Garmin MFDs (multi-function displays). See your Garmin dealer or the Garmin Web site for more details. To
complete the installation, you need the appropriate fasteners, tools, and mounts. These items should be available at most marine dealers. Always

wear safety goggles, ear protection, and a dust mask when drilling, cutting, or sanding. When drilling or cutting, always check rst to see what
is on the other side of the surface. If you experience difculty with the installation, contact Garmin Product Support or seek the assistance of a

professional installer.

Installation Guidelines

To maximize the performance of the radar, observe the following installation guidelines:

• An ideal scanner mounting location is high above the ship’s keel line with a minimal part of the vessel’s structure or rigging blocking
the radar beam. Obstructions in the path of the radar beam may cause blind and shadow sectors, or generate false echoes. The higher the
installation position, the further the scanner can detect targets.

• Avoid mounting the scanner on the same level as smoke stacks, horizontal spreaders, or crosstrees on a mast. Do not install the scanner
near heat sources where it may be subjected to smoke or hot air from smoke stacks or heat from lights.

• The mounting surface or platform should be sturdy enough to support the weight of the scanner (15.8 lbs/7.17 kg), at as possible, and

parallel with the vessel’s water line.

• It is recommended that the radar scanner 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, eyes are the most sensitive part of the body to electromagnetic
energy. 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.

• A “Compass Safe Distance” must be maintained between the compass and the scanner. The Compass Safe Distance is measured from the
center point of the compass to the nearest point on the scanner.

Standard compass = 1 m (39.37")

Standby Steering and Emergency compasses = 0.5 m (19.7")

12.5°

12.5°

12.5°

12.5°

• Mount other electronics and cables more than 2 m (7 ft) from the path of a radar beam. A radar beam can normally be assumed to spread
25° vertically above and below the scanner’s radiating element. For vessels with higher bow angles at cruise speed, it may be helpful to
lower the angle so the beam points slightly downward to the waterline while at rest. Shims may be used as necessary.

• Install the scanner away from antennas for other electronics. GPS antennas should be either above or below the radar beam path of the
scanner. Mount at least 1 m (3 ft) from any equipment transmitting or cables carrying radio signals, such as VHF radios, cables and
antennas. In the case of SSB radios, the distance should be increased to 2 m (7 ft). IEC 60936-1 clause 3-27.1 states maximum distances
from the antenna at which RF (radio frequency) levels can be expected.

(100W/m squared = 48" [121.92 cm]) (10W/m squared = 108" [274.32 cm])

• The radar scanner transmits electromagnetic energy. It is important that the radar is turned off or the DC power input is disconnected
when personnel are required to come close to the scanner to perform work on the scanner assembly or associated equipment.

2

GMR 18 Radar Installation Manual