Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p198
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 198/225)
Character Range: 829798–832703

the base station and aircraft and vehicles using the facilities. The construction of buildings or towers can prevent reliable communications. The Area of Interest for the VHF/UHF facilities includes all developments between 100 m and 2 000 m that exceed a height of 10 m above ground level at the base of the VHF/UHF antenna.

       (1) For VHF/UHF communications facilities, the aerodrome operator must refer the following for assessment by the navigation service and facility provider responsible for the facilities as illustrated in Figure 19.12 (1):

(a) any proposed development, pole, antenna, welding, surveying, construction or crane operation within 100 m of the centre of the VHF/UHF antenna (the restricted area);

(b) any proposed development between 100 m and 600 m from the centre of the antenna that would exceed an angle of elevation of 1.1° from 10 m above ground level (measured at the centre of the antenna) and then extending out to a distance of 2 000 m from the centre of the antenna, including the area above the restricted area (the area of interest).

       (2) If there is overlap between the restricted area and area of interest illustrated in Figure 19.12 (1), the restricted area takes precedence over the classification for all included areas.

       (3) Within the area of interest, all developments, except those concerning light poles and crane operations, must be referred for assessment to the communications service and facility provider responsible for the system.

    Figure 19.12 (1)   VHF facility restricted area and area of interest (illustrates matters)

19.13 Protection of HF communication facilities

Note   For HF transmit antennas, to ensure that the HF antenna performance is not compromised, substantial structures are generally prohibited within the restricted area, however, simple vertical towers and masts of any height may be acceptable beyond 100 m from the centre of the antenna.

       (1) For HF communications facilities, the aerodrome operator must refer the following for assessment by the communications service and facility provider responsible for the HF transmit antenna, as illustrated in Figure 19.13 (1):

(a) any proposed development, pole, antenna, welding, surveying, construction or crane operation within 100 m of the antenna (the restricted area);

(b) any proposed development between 100 m and 600 m from the centre of the antenna that would exceed an angle of elevation of 2.5° from 10 m above ground level at the centre of the antenna, including the area above the restricted area (the area of interest).

    Figure 19.13 (1)   HF transmit facility restricted area and area of interest (illustrates matters)

       (2) For an HF receive antenna, the aerodrome operator must refer the following for assessment by the communications service and facility provider responsible for the HF receive antenna, as illustrated in