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The T221 sensor requires an existing Micronet system and specific components to function properly. You will need the following items:

A Micronet display capable of configuring the compass (e.g., Digital, Dual Digital, or Remote models, but NOT the Analogue display).A wireless wind transducer from Micronet.In addition to these two devices, one of the following combinations is also required:A T121 hull transducer and a T909 compass.An STng heading source (such as an EV-1) and a Micro-Talk gateway.

The Raymarine T221 wireless mast rotation sensor is specifically designed for sailboats equipped with rotating masts. Its primary function is to provide essential correction for apparent wind angle data. It ensures that wind information displayed on Micronet displays remains accurate, regardless of mast rotation, which is critical for performance optimization.

For optimal performance, the T221 sensor should be installed at the front of the mast, less than 1.5 meters above the deck. The location must be free from magnetic interference and provide the solar panels with an unobstructed view of the sky. The mount can be permanently fixed with non-magnetic rivets or screws, or temporarily with the supplied Velcro strap. Integration into the network is done via self-networking.

To ensure T221 sensor accuracy, calibration is required. Follow these main steps:

Secure the mast in the boat's longitudinal axis.In open water, select the compass configuration page on a Micronet display and note the displayed deviation.Perform a deviation correction turn until the display shows 'calibration complete'.For systems with T121 and T909 only, check the displayed deviation. If it has changed by more than 1° compared to the noted value, repeat the turns. If the deviation is stable, your system is correctly calibrated.Exit the configuration on the Micronet display and unlock the mast from its longitudinal position.

You can monitor the battery level of the T221 mast rotation sensor and the solar charge rate from a compatible Micronet display. Go to the MAST® page located in the Health chapter of your screen. If the sensor’s battery level becomes low, the "Mast Low Batt" alarm will be displayed.

The T221 sensor is compatible with Micronet displays that support compass configuration. This specifically includes the Digital, Dual Digital, and Remote models. It is NOT compatible with the Micronet Analogue display.

Using a mast rotation sensor, such as the Raymarine T221, is critical for sailboats equipped with rotating masts. Without this sensor, apparent wind angle data would be skewed by the mast's rotation. The T221 ensures wind information remains accurate, enabling better sail trim optimization and significantly improving boat performance, especially in regattas or fast cruising with specific rigging.

Yes, the location chosen for installing the T221 sensor must be free from magnetic disturbances. Most materials such as stainless steel, aluminum, carbon, and brass generally do not cause magnetic disturbances. It is important to select a spot where these types of materials would not interfere with the sensor's operation.