a. What is the ICAO minimum?
ICAO Annex 14, volume I, chapter 3, paragraph 3.5:
3.5.1 A runway end safety area shall be provided at each end of a runway strip where:
— the code number is 3 or 4; and
— the code number is 1 or 2 and the runway is an instrument one.
3.5.2 A runway end safety area shall extend from the end of a runway strip to a distance of at least 90 m.
3.5.3
Recommendation.- A runway end safety area should, as far as practicable, extend from the end of a runway strip to a distance of at least:
- 240 m where the code number is 3 or 4; and
- 120 m where the code number is 1 or 2.
3.5.4 The width of a runway end safety area shall be at least twice that of the associated runway.
3.5.5
Recommendation.- The width of a runway end safety area should, wherever practicable, be equal to that of the graded portion of the associated runway strip.
b. What is/where can I locate the exact reference? (not having a copy of Doc 9197)
See above.
c. How is it linked to the aircraft type and runway length?
ICAO Annex 14, volume I, chapter 1, paragraph 1.6:
1.6.1 An aerodrome reference code — code number and letter — which is selected for aerodrome planning purposes shall be determined in accordance with the characteristics of the aeroplane for which an aerodrome facility is intended.
1.6.2 The aerodrome reference code numbers and letters shall have the meanings assigned to them in Table 1-1.
1.6.3 The code number for element 1 shall be determined from Table 1-1, column 1, selecting the code number corresponding to the highest value of the aeroplane reference field lengths of the aeroplanes for which the runway is intended.
Table 1-1 (excerpt)
Code number 1: Aerodrome reference field length less than 800 m
Code number 2: Aerodrome reference field length 800 m up to but not including 1200 m
Code number 3: Aerodrome reference field length 1200 m up to but not including 1800 m
Code number 4: Aerodrome reference field length 1800 m ond over