How should aircraft categories be determined for the purpose of aerodrome operating minima?

Aircraft categories should be based on the indicated airspeed at threshold (VAT), which is equal to the stalling speed (VSO) multiplied by 1.3 or, where published, the 1-g 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 should be used.

What is the formula for calculating VAT when both VSO and VS1g are available?

VAT is equal to VSO multiplied by 1.3 or VS1g multiplied by 1.23, and if both are available, the higher resulting VAT should be used.

In the landing configuration, at what mass should the stalling speeds be considered for determining aircraft category?

The stalling speeds should be considered at the maximum certified landing mass.

What is the VAT range for aircraft category C?

Category C corresponds to VAT from 121 to 140 kt.

Which aircraft category covers a VAT of 165 knots?

Category D covers VAT from 141 to 165 kt, so 165 kt falls in category D.

What is the VAT threshold for an aircraft to be classified as category A?

Category A is for VAT less than 91 kt.

Are helicopters eligible for a specific category under this guidance?

Yes, helicopters are also eligible for Category H where applicable.

If an aircraft has a VAT of 90 knots, which category does it belong to?

It belongs to category A, because category A is for VAT less than 91 kt.

What is the upper limit of VAT for category B?

The upper limit for category B is 120 kt, as category B is from 91 to 120 kt.

Which category includes a VAT of 210 knots?

Category E includes VAT from 166 to 210 kt, so 210 kt is in category E.

GM1 NCO.OP.110 Aerodrome operating minima -- aeroplanes and helicopters

Navigate / EASA

Ask question Discover more Add to collection

GM1 NCO.OP.110 Aerodrome operating minima — aeroplanes and helicopters

ED Decision 2023/007/R

AIRCRAFT CATEGORIES

(a) Aircraft categories should be based on the indicated airspeed at threshold (V_AT), which is equal to the stalling speed (V_SO) multiplied by 1.3 or where published 1-g (gravity) stall speed (V_S1g) multiplied by 1.23 in the landing configuration at the maximum certified landing mass. If both V_SO and V_S1g are available, the higher resulting V_AT should be used.

(b) The aircraft categories specified in Table 7 should be used.

Table 7: Aircraft categories corresponding to VAT values

Aircraft category	V_AT
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

Details

Source-Title: GM1 NCO.OP.110 Aerodrome operating minima -- aeroplanes and helicopters View latest amendments

Erulesid: ERULES-1963177438-13555 Compare versions

Domain: Air operations

Amendedby: Issue 2, Amendment 16

Applicabilitydate: 29 June, 2023

Entryintoforcedate: 29 June, 2023

Regulatorysource: ED Decision 2023/007/R Navigate

Regulatorysubject: Part-NCO

Typeofcontent: GM to IR (Guidance material to implementing rule)

Parentir: NCO.OP.110 Aerodrome operating minima -- aeroplanes and helicopters

Origin: EASA

Category: EAR