Airport Engineering
The width and interval of transverse centre line bars along the extended centre line of runway, in approach lighting system are

4.2 m and 50 m
3 m and 30 m
4.2 m and 30 m
3 m and 45 m

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Airport Engineering
Castor angle is defined as the angle

Between the true speed of the aircraft and the crosswind component
Between the direction of wind and the longitudinal axis of the runway
Between the horizontal and the fuselage axis
Formed by the longitudinal axis of the aircraft and the direction of movement of the nose gear

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