Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p196
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 196/225)
Character Range: 824799–827427

between 60 m and 300 m from the centre of the NDB antenna that exceeds an angle of elevation of 5° from ground level at the centre of the NDB antenna.

Note   Within 60 m of the centre of the NDB antenna, generally there should be no obstacles except for essential infrastructure such as the equipment building, antenna support towers and site fencing, and vegetation should be kept below a height of 0.6 m. Overhead low-voltage power lines and telephone lines serving the NDB should be kept at least 60 m from the centre of the NDB antenna. Power and telephone lines should be underground within 60 m of the centre of the NDB antenna.

       (2) The following are not permitted over or on the earth mat area associated with the NDB:

(a) ploughing;

(b) livestock (other than sheep).

19.09 Protection of ground-based augmented systems (GBASs)

       (1) For a GBAS, the aerodrome operator must refer the following for assessment by the navigation service and facility provider responsible for the GBAS:

(a) any proposal for development within 200 m of the VDB antenna;

(b) any proposal for development between 200 m and 3 000 m from the VDB antenna that exceeds an angle of elevation of 0.9° measured from ground level at the base of the VDB antenna.

       (2) For the RSMU antenna, the aerodrome operator must refer the following for assessment by the navigation service and facility provider responsible for the antenna:

(a) any proposal for development within 155 m of the RSMU antenna;

(b) any proposal for development between 155 m and 3 000 m from the RSMU antenna that exceeds an angle of elevation of 3° measured from ground level at the base of the RSMU antenna.

19.10 Protection of radar sensor sites

       (1) For any site within the aerodrome boundary that is used to monitor a primary, secondary or en route radar, the aerodrome operator must refer for assessment by the navigation service and facility provider any proposal for development that is:

(a) within 500 m of the site's monitoring antenna, limited to a sector ± 45° either side of the line of sight to the radar; and

(b) 4 m or more above the height of the site monitoring antenna.

Note 1   All buildings and fences within and below the 4 000 m limit degrade the performance of the sensor. If possible, these obstructions should be avoided. Reflection minimisation techniques may be used to reduce the interference to a minimum, for example, RF traps, use of trees and shrubs, no fences tangent to the sensor.

Note 2   For further background details on the "area of interest" for radar monitoring sites, see Guideline G of the National