(f)  
The touchdown zone RVR shall always be controlling. If reported and relevant, the midpoint and stopend RVR shall also be controlling. The minimum RVR value for the midpoint shall be 125 m or the RVR required for the touchdown zone if less, and 75 m for the stopend. For aircraft equipped with a rollout guidance or control system, the minimum RVR value for the midpoint shall be 75 m.

CAT.OP.MPA.310 Operating procedures — threshold crossing height — aeroplanes
The operator shall establish operational procedures designed to ensure that an aeroplane conducting precision approaches crosses the threshold of the runway by a safe margin, with the aeroplane in the landing configuration and attitude.

CAT.OP.MPA.315 Flight hours reporting — helicopters
The operator shall make available to the competent authority the hours flown for each helicopter operated during the previous calendar year.

CAT.OP.MPA.320 Aircraft 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
Aircraft 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 

(c)  
The landing configuration that is to be taken into consideration shall be specified in the operations manual.

(d)  
The operator may apply a lower landing mass for determining the VAT if approved by the competent authority. Such a lower landing mass shall be a permanent value, independent of the changing conditions of day-to-day operations.

Subpart C — Aircraft performance and operating limitations
Section 1 — Aeroplanes
Chapter 1 — General requirements

CAT.POL.A.100 Performance classes
(a)  
The aeroplane shall be operated in accordance with the applicable performance class requirements.

(b)  
Where full compliance with the applicable requirements of this Section cannot be shown due to specific design characteristics, the operator shall apply approved performance standards that ensure a level of safety equivalent to that of the appropriate chapter.

CAT.POL.A.105 General
(a)  The mass of the aeroplane:
(1)  
at the start of the take-off; or 

(2)  
in the event of in-flight replanning, at the point from which the revised operational flight plan applies,
　
中國航空網(wǎng) www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：Annexes to the draft Commission Regulation on ‘Air Operations - OPS’(94)