GMR™ 1234 xHD3 Radar open-array and pedestal

The Garmin GMR 1234 xHD3 radar operates with a 12 kW transmission power, providing effective target detection at sea.

The GMR 1234 xHD3 radar is supplied with a 4-foot (122 cm) open-array antenna.

This radar provides a maximum range of 96 nautical miles, enabling long-range detection of targets, obstacles, and weather conditions.

The GMR 1234 xHD3 radar antenna can operate at rotation speeds of 24 or 48 revolutions per minute (rpm).

The radar integrates several advanced technologies for improved detection:

Scan Averaging: Filters sea clutter and interference, improving target display.True Echo Trails: Displays movement history to quickly identify collision threats.Dynamic Auto Gain: Automatically adjusts gain levels for optimal performance.It also allows angular adjustment of target size to optimize their shape on screen.

Yes, the GMR 1234 xHD3 radar allows dual-range with overlay on a compatible display, providing independent views for short and long ranges.

When selecting the installation location, consider the following points:

The radar must be mounted out of reach of people, with the vertical beam above head height. It should be positioned high above the vessel's keel line, with minimal obstructions to the beam. The mounting surface must be flat, parallel to the vessel's waterline, and sufficiently robust to support the radar's weight. Avoid mounting it near heat sources (exhausts, lights) or at the same height as spreaders or mast crossarms.

Hex nuts must be tightened to 14.7 N·m (11 lbf·ft) torque to securely mount the radar to the surface without damaging the unit or mounting hardware.

To install the antenna:

Remove the protective cover from the waveguide on top of the pedestal.
Remove the mounting hardware from the underside of the antenna (screws and washers).
Align the pedestal’s waveguide with the socket under the antenna and slide the antenna onto the pedestal.
Secure the antenna to the pedestal using the hexagonal screws, spring washers, and flat washers previously removed from the antenna.
Tighten the hexagonal screws to a torque of 0.81 kgf-m (70 lbf-in or 5.83 lbf-ft) using a torque wrench.

If your model is supplied with a voltage converter, it must be installed for the radar to function correctly. The converter requires an input voltage of 10 to 32 Vdc and must be installed as close as possible to the power source. If the radar is not supplied with a converter, it can be connected directly to the boat’s battery (11 to 32 Vdc).

Yes, it is possible to extend the power cable, but it is recommended to connect it directly to the battery. If an extension is necessary, the appropriate wire gauge must be used based on the length of the extension. For example, for a 3 m distance, a 3.31 mm² (12 AWG) wire is required. Crimp connectors and heat-shrink tubing must be used for a watertight connection.

The radar transmits electromagnetic energy. To avoid bodily injury, do not look directly at the antenna at short range while the radar is transmitting. Ensure the radar is installed so that the vertical beam is above the height of people’s heads. The radar must be used only as a navigation aid and not for precise measurements.

No, this device contains no user-serviceable parts. It must only be opened by a technician authorized by Garmin. Any damage resulting from unauthorized opening of the unit will void the Garmin warranty.

The Garmin GMR 1234 xHD3 radar is a 12 kW solution designed for offshore navigation and fishing. It features a 4-foot (122 cm) antenna and offers a maximum range of 96 nautical miles. This radar enables precise detection of targets, obstacles, and weather conditions. It operates with a transmission power of 12 kW and provides rotation speeds of 24 and 48 rpm. The horizontal beam width is 1.8° and the vertical beam width is 23°.

Yes, the Garmin GMR 1234 xHD3 radar allows dual-range with overlay on a compatible display. This feature provides independent views for short and long ranges, improving situational awareness by enabling simultaneous observation of areas close to and far from the vessel.

The GMR 1234 xHD3 radar integrates several advanced technologies to optimize detection and clarity:

Scan Averaging: This technology filters sea clutter and interference, improving target display clarity.Angular target size adjustment: This function optimizes the shape of objects on screen for better identification.True Echo Trails: This feature displays the historical movement of targets, enabling quick identification of collision threats.Dynamic Auto Gain: This system automatically adjusts gain levels to maintain optimal performance in varying conditions.

Garmin's non-aeronautical products, including the GMR 1234 xHD3 radar, are warranted against defects in materials or workmanship for one year from the date of purchase. During this period, Garmin will repair or replace, at its sole discretion, any defective component under normal use conditions. This limited warranty does not cover cosmetic damage, consumable parts (unless the damage is due to a defect), damage caused by accident, misuse, abuse, water, fire, or other external causes. It also does not cover damage resulting from service performed by personnel not authorized by Garmin, products modified without Garmin's written permission, or connected to cables not supplied by Garmin. Opening the device by anyone other than a Garmin authorized service technician will void the product warranty.