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The initiation of the Gyro Null action requires the system to be in Standby mode. In this state, the gyro is still receiving power, but it is not actively engaged in procession or broadcasting heading data. This allows for the necessary adjustments to be made without interference from operational outputs. When in Standby mode, the system is prepared to perform calibration activities, which include settling and establishing a reference point for accurate directional data.

In contrast, the other states either do not allow for the necessary adjustments or involve the gyro actively functioning, which would be unsuitable for nulling the gyro at that moment. Calibration mode, for example, is focused on setting parameters rather than performing the null action, while operational mode indicates the system is active in providing heading data, which is contrary to what is needed for initializing the Gyro Null process. Similarly, power-saving mode usually reduces functionality to conserve energy and is not conducive to performing detailed adjustments required for gyro nulling.