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Regarding all weather operations, if the IAS at threshold (VAT) is from 141 kt to 165 kt, the aircraft is in:
  • A
    Category C.
  • B
    Category D.
  • C
    Category E.
  • D
    Category B.

EASA AIR OPS
CAT.OP.MPA.320 Aeroplane categories:

(a) Aircraft categories shall be based on the indicated airspeed at threshold (VAT) which is equal to the stalling speed (VSO) multiplied by 1,3 or one-g (gravity) stall speed (VS1g) multiplied by 1,23 in the landing configuration at the maximum certified landing mass. If both VSO and VS1g are available, the higher resulting VAT shall be used.

(b) The aircraft categories specified in the table below shall be used.

Table 1: Aircraft categories corresponding to VAT values

Aeroplane category VAT
A Less than 91 kt
B From 91 to 120 kt
C From 121 to 140 kt
D From 141 to 165 kt
E From 166 to 210 kt
NOTE:
If no specific procedures are published, helicopters should be operated as Category A.

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