when information is available indicating that the expected weather conditions, at the time of arrival, at the destination and/or required alternate aerodrome(s) are at or above the applicable aerodrome operating minima.

CAT.OP.MPA.247 Meteorological conditions — helicopters
In addition to CAT.OP.MPA.245:
(a)  
On VFR flights overwater out of sight of land with helicopters, the commander shall only commence take-off when the appropriate weather reports and/or forecasts indicate that the cloud ceiling will be above 600 ft by day or 1 200 ft by night.

(b)  
Notwithstanding (a), when flying between helidecks located in class G airspace where the overwater sector is less than 10 NM, VFR flights may be conducted when the limits are at, or better than, the following:

Table 1: Minima for flying between helidecks located in class G airspace
Day  Night 
Height *  Visibility  Height *  Visibility 
Single-pilot  300 ft  3 km  500 ft  5 km 
Two pilots  300 ft  2 km **  500 ft  5 km *** 

*:  The cloud base shall be such as to allow flight at the specified height, below and clear of cloud.
**:  Helicopters may be operated in flight visibility down to 800 m provided the destination or an intermediate structure is continuously visible.
***:  Helicopters may be operated in flight visibility down to 1 500 m provided the destination or an intermediate structure are continuously visible. 
(c)  Flight with helicopters to a helideck or elevated FATO shall only be operated when the mean wind speed at the helideck or elevated FATO is reported to be less than 60 kt.

CAT.OP.MPA.250 Ice and other contaminants — ground procedures
(a)  
The operator shall establish procedures to be followed when ground de-icing and anti-icing and related inspections of the aircraft are necessary to allow the safe operation of the aircraft.

(b)  
The commander shall only commence take-off if the aircraft is clear of any deposit that might adversely affect the performance or controllability of the aircraft, except as permitted under (a) and in accordance with the AFM.

CAT.OP.MPA.255 Ice and other contaminants — flight procedures
(a)  
The operator shall establish procedures for flights in expected or actual icing conditions.

(b)  
The commander shall only commence a flight or intentionally fly into expected or actual icing conditions if the aircraft is certified and equipped to cope with such conditions.

(c)  
If icing exceeds the intensity of icing for which the aircraft is certified or if an aircraft not certified for flight in known icing conditions encounters icing, the commander shall exit the icing conditions without delay, by a change of level and/or route, if necessary by declaring an emergency to ATC.
　
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本文鏈接地址：Annexes to the draft Commission Regulation on ‘Air Operations - OPS’(90)