Category of aircraft for approach procedures[PDF]

Aircraft performance has a direct effect on the airspace and visibility required for the various manoeuvres associated with the conduct of instrument approach procedures.
The most significant performance factor is aircraft speed.

Accordingly, categories of aircraft have been established. These categories provide a standardized basis for relating aircraft manoeuvrability to specific instrument approach procedures.

The criteria taken into consideration for the classification of aeroplanes by categories is the indicated airspeed at threshold (Vat) which is equal to the stall speed Vso multiplied by 1.3 or stall speed Vs1g multiplied by 1.23 in the landing configuration at the maximum certificated landing mass. If both Vso and Vs1g are available, the higher resulting Vat shall be used.

Aircraft categories will be referred to throughout this document by their letter designations as follows:

Category Vat (km/h) Vat (knots)
Category A IAS < 169 km/h IAS < 91 kt
Category B 169 km/h ≤ IAS < 224 km/h 91 kt ≤ IAS < 121 kt
Category C 224 km/h ≤ IAS < 261 km/h 121 kt ≤ IAS < 141 kt
Category D 261 km/h ≤ IAS < 307 km/h 141 kt ≤ IAS < 166 kt
Category E 307 km/h ≤ IAS < 391 km/h 166 kt ≤ IAS < 211 kt
Category H is only for helicopters.


The procedures and the track protections are constructed using a predefined speed range depending on the localization inside the approach tracks.
Aircraft Category Vat (kt) Speed for initial approach (kt) Speed for final approach (kt) Maximum speed for visual manoeuvring (kt) Maximum speed for missed approach Intermediate (kt) Maximum speed for missed approach Final (kt)
A <91 90/150 70/100 100 100 110
B 91/120 120/180 85/130 135 130 150
C 121/140 160/240 115/160 180 160 240
D 141/165 185/250 130/185 205 185 265
E 166/210 185/250 155/230 240 230 275
H N/A 70/120 60/90 N/A 70/90 70/90

N/A = Not Applicable


See also

  • none

Reference

  • ICAO Documentation 8168 - Aircraft Operations - Volume II - 6th Edition 2014 - Chapter 1.3 & 1.8

Author

  • VID 150259 - Creation
  • VID 150259 - Wiki integration

DATE OF SUBMISSION

  • 00:28, 14 May 2021

COPYRIGHT

  • This documentation is copyrighted as part of the intellectual property of the International Virtual Aviation Organisation.

DISCLAIMER

  • The content of this documentation is intended for aviation simulation only and must not be used for real aviation operations.