The operator shall only select the destination aerodrome when:
(1)  
the appropriate weather reports and/or forecasts indicate that, during a period commencing 1 hour before and ending 1 hour after the estimated time of arrival at the aerodrome, the weather conditions will be at or above the applicable planning minima as follows:

(i)  
RVR/visibility (VIS) specified in accordance with CAT.OP.MPA.110; and

(ii)
for an NPA or a circling operation, the ceiling at or above MDH;  or

(2)  
two destination alternate aerodromes are selected.

(c)  Planning minima for a destination alternate aerodrome, isolated aerodrome, fuel en-route alternate (fuel ERA) aerodrome, en-route alternate (ERA) aerodrome
The operator shall only select an aerodrome for one of these purposes when the appropriate weather reports and/or forecasts indicate that, during a period commencing 1 hour before and ending 1 hour after the estimated time of arrival at the aerodrome, the weather conditions will be at or above the planning minima in Table 1. 
Table 1: Planning minima Destination alternate aerodrome, isolated destination aerodrome, fuel ERA and ERA aerodrome
Type of approach  Planning minima 
CAT II and III  CAT I RVR 
CATI  NPA RVR/VIS Ceiling shall be at or above MDH 
NPA  NPA RVR/VIS + 1 000 m Ceiling shall be at or above MDH + 200 ft 
Circling  Circling 

CAT.OP.MPA.186 Planning minima for IFR flights — helicopters
(a)  
Planning minima for take-off alternate aerodrome(s)

The operator shall only select an aerodrome or landing site as a take-off alternate aerodrome when the appropriate weather reports and/or forecasts indicate that, during a period commencing 1 hour before and ending 1 hour after the estimated time of arrival at the take-off alternate aerodrome, the weather conditions will be at or above the applicable landing minima specified in accordance with CAT.OP.MPA.110. The ceiling shall be taken into account when the only approach operations available are NPA operations. Any limitation related to OEI operations shall be taken into account.

(b)  
Planning minima for destination aerodrome and destination alternate aerodrome(s) 

The operator shall only select the destination and/or destination alternate aerodrome(s) when the appropriate weather reports and/or forecasts indicate that, during a period commencing 1 hour before and ending 1 hour after the estimated time of arrival at the aerodrome or operating site, the weather conditions will be at or above the applicable planning minima as follows:
(1)  
except as provided in CAT.OP.MPA.181 (d), planning minima for a destination aerodrome shall be:

(i)  
RVR/VIS specified in accordance with CAT.OP.MPA.110; and

(ii)  
　
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本文鏈接地址：Annexes to the draft Commission Regulation on ‘Air Operations - OPS’(86)