In accordance with OPS 1 430 (Aerodrome Operating Minima - General), it is established, among other considerations, that an Operator must take full account of Aeroplane Categories.The criteria taken into consideration for classification of Aeroplanes by Categories is the indicated airspeed at threshold (Vat), which is equal to the stalling speed at the maximum landing mass (Vso) multiplied by 1,3.Corresponding Aeroplane Category when Vat is from 141 kt to 165 kt is: