GRF™ 10 – Rudder Angle Sensor

The Garmin GRF™ 10 rudder angle sensor is a device designed for Garmin autopilot systems. It provides precise and reliable feedback on the rudder position, which is essential for smooth navigation and manoeuvring.

The GRF™ 10 sensor uses magnetic sensor technology. This approach sets it apart from traditional potentiometer-based sensors by eliminating physical contacts, which reduces mechanical wear and ensures extended lifespan and consistent accuracy.

The GRF™ 10's magnetic sensor technology offers several advantages, including extended lifespan due to the absence of physical contacts subject to mechanical wear, and consistent accuracy for reliable feedback on rudder position.

The GRF™ 10 sensor measures 60.8 mm in height, 70 mm in width, and 191.4 mm in depth.

The Garmin GRF™ 10 sensor weighs 157 grams.

Yes, the GRF™ 10 sensor is built with marine-grade materials and is waterproof to IEC 60529 IPX7 standards.

The GRF™ 10 sensor operates within a temperature range from -15°C to 70°C.

The safe distance from a compass for the GRF™ 10 sensor is 1 metre.

The GRF™ 10 sensor is compatible with Garmin autopilot systems such as the GHP 12, GHP 20, GHP Reactor, and GHP Reactor 40.

The GRF™ 10 sensor connects to the autopilot system via a 12-pin rudder feedback connector.

The GRF™ 10 sensor has a maximum movement range of 140 degrees, i.e. 70 degrees on each side of the central position.

The cable connected to the GRF™ 10 sensor is 2 meters long.

Yes, extension cables for the sensor are available. The maximum extension cable length is 15 meters, using up to three 5-meter extensions. It is important not to cut the sensor cable to extend or shorten it.

A drill with a 3.2 mm (1/8 in) bit8 mm and 10 mm wrenches10 mm socket wrenchMetal saw suitable for cutting a threaded rodNo. 2 Phillips screwdriverTape measurePencil or markerExtension cables, if needed

The GRF™ 10 sensor must be installed parallel to the tiller arm when the helm is centered. Additionally, the connecting rod must be installed perpendicular to both the tiller arm and the sensor, ideally using the second hole from the end of the sensor for the ball-joint connector.

Yes, the supplied threaded rod, which is 300 mm long, can be shortened if the included length is too long for the chosen installation location.

After installation and connection to a Garmin autopilot system, the sensor is configured via the autopilot's helm command or a connected chartplotter. The steps include:

Access "Autopilot Setup > Autopilot Installation Setup > Steering System Setup > Rudder Sensor Setup".Position the helm fully to starboard and confirm.Position the helm fully to port and confirm.Center the helm, release, and start calibration.The autopilot will then take control to calibrate the helm.

If an error appears during configuration, the sensor may have reached the limit of its movement range. Ensure the sensor has been installed correctly. If the issue persists, you can bypass this error by moving the bar to the farthest position that does not report an error.

Yes, the Garmin GRF™ 10 rudder angle sensor is covered by Garmin’s standard limited warranty applicable to this accessory.

GRF™ 10 rudder angle sensor
M42 x 105 mm bolt
2 x M6 locknuts
2 x M6 nuts
1 x washer
1 x tiller arm support
2 x spherical joint assemblies
1 x threaded rod