Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:5:p93
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 5 (pt 93/225)
Character Range: 553249–555775

direction;

(d) for the wing bar light units — produce:

 (i) a beam of white light from 1° 54' vertical angle up to 6° vertical angle; and

 (ii) a beam of red light from 0° to 1° 54' vertical angle or greater, but only so much greater as to provide obstacle clearance;

(e) for the fly-down light units — produce a beam of white light extending from an elevation of 6° down to approximately the approach slope, where it must have a sharp cut-off;

(f) for the fly-up light units — produce:

 (i) a beam of white light from approximately the approach slope down to 1° 54' vertical angle; and

 (ii) a beam of red light below 1° 54' vertical angle, or greater, but only so much greater as to provide obstacle clearance;

(g) have colour transition from white to red such that it appears to an observer at a distance of not less than 300 m to occur over a vertical angle of not more than 15 minutes;

(h) be such that the beam of light produced by each of the VASIS light units must show:

 (i) both day and night — through an angle of at least 1° 30' above and below the approach slope; and

 (ii) in azimuth through:

             (A) not less than 10° by day; and

             (B) not less than 15° by night;

          Note   CASA recommends an increase in the night azimuth to 30° in line with past practice in Australia.

(i) immediately below the transition sector mentioned in paragraph (g) — have completely red beam intensity of not less than 15% of the intensity of the completely white beam immediately above the transition sector;

(j) for all light units — have effective visual range in clear weather of at least 7.4 km over the angles mentioned in paragraphs (d), (e) and (f);

(k) for all light units — be so designed and constructed that contamination from dirt or animal faeces on optically-transmitting or reflecting surfaces does not:

 (i) interfere with the light signals; or

 (ii) affect the elevation of the beams; or

 (iii) affect the contrast between the red and white signals;

(l) for all light units — be so designed and constructed as to minimise the probability of the slots in the light housing being wholly or partially blocked by snow or ice (if the relevant climatic conditions are possible).

       (2) The approach slope and elevation settings of light beams must comply with the following:

(a) an approach slope of 3º;

(b) a pilot eye-height over the threshold of 15 m;

(c) if the runway on which a T-VASIS is provided is also equipped with an ILS — the siting and elevation of the