CAA NZ ATPL Theory - Flight Navigation General Practice Questions - CAA NZ ATPL Theory - Flight Navigation General (New Zealand) Exam

Why is 'dither' (a subtle mechanical oscillation) applied to a Ring Laser Gyroscope during operation?

To prevent 'laser lock-in' at low rotational rates by keeping the gyro in continuous motion. To cool the laser optical cavity and maintain thermal equilibrium. To align the laser beams with local magnetic north during ground initialisation. To compensate for aircraft structural vibrations during high-speed cruise.

Correct Answer:

To prevent 'laser lock-in' at low rotational rates by keeping the gyro in continuous motion.

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