ADVOKS GLOBAL · KENYA
The Civil Aviation (Environmental Protection Aircraft Noise) Regulations, 2025
47. Reference noise measurement points
Edition: 2026-03-03 · In force
47. Reference noise measurement points
A helicopter, when tested in accordance with these Regulations, shall not exceed the noise levels specified in regulation 48 at the following points—(a)take-off reference noise measurement points—(i)a flight path reference point located on the ground vertically below the flight path defined in the take-off reference procedure and 500 m horizontally in the direction of flight from the point at which transition to climbing flight is initiated in the reference procedure set out in regulation 50;(ii)two other points on the ground symmetrically disposed at 150 m on both sides of the flight path defined in the take-off reference procedure and lying on a line through the flight path reference point.(b)overflight reference noise measurement points—(i)a flight path reference point located on the ground 150 m (492 ft) vertically below the flight path defined in the overflight reference procedure (see 8.6.3.1);(ii)two other points on the ground symmetrically disposed at 150 m on both sides of the flight path defined in the overflight reference procedure and lying on a line through the flight path reference point.(c)approach reference noise measurement points—(i)a flight path reference point located on the ground 120 m (394 ft) vertically below the flight path defined in the approach reference procedure (see 8.6.4). On level ground, this corresponds to a position 1 140 m from the intersection of the 6.0° approach path with the ground plane;(ii)two other points on the ground symmetrically disposed at 150 m on both sides of the flight path defined in the approach reference procedure and lying on a line through the flight path reference point.