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Old 2nd Oct 2011, 17:33
  #263 (permalink)  
bookworm
 
Join Date: Aug 2000
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That's correct DP. And there's a twist.

Under ICAO Annex 6, the requirement for an IFR flight is:

"2.2.3.4.2 A flight to be conducted in accordance with the instrument flight rules shall not be commenced unless information is available which indicates that conditions at the aerodrome of intended landing or, where a destination alternate is required, at least one destination alternate aerodrome will, at the estimated time of arrival, be at or above the aerodrome operating minima

2.2.4.1.1 A flight shall not be continued towards the aerodrome of intended landing, unless the latest available information indicates that at the expected time of arrival, a landing can be effected at that aerodrome or at least one destination alternate aerodrome, in compliance with the operating minima established in accordance with 2.2.2.2"

The logic is very clear. You need destination or alternate above minima, not both. For an IFR flight, this may be reasonable. However, at the very last minute of the preparation of the EASA Part OPS CRD, the wording was changed to:

"NCO.OP.145 Destination alternate aerodromes – aeroplanes
For IFR flights, the pilot-in-command shall specify at least one weather-permissible
destination alternate aerodrome in the flight plan, unless:
(a) the available current meteorological information indicates that, for the period from
1 hour before until 1 hour after the estimated time of arrival, or from the actual
time of departure to 1 hour after the estimated time of arrival, whichever is the
shorter period, the approach and landing may be made under visual meteorological
conditions (VMC);

Weather-permissible aerodrome’ means an adequate aerodrome where, for the
anticipated time of use, weather reports, or forecasts, or any combination thereof,
indicate that the weather conditions will be at or above the required aerodrome
operating minima, and the runway surface condition reports indicate that a safe
landing will be possible."

That changes the logic (for all non-commercial IFR flights) slightly, and even though I think you have to be a lunatic to take-off when your destination is in hard IMC and your alternate is below minima, I don't think the consequences of the change are intended.

Given the EIR is rather weather sensitive, I did make the suggestion before the FCL.008 NPA was published that for the EIR and was more appropriate than or, but it was too far down the road to publication. It would be a very fitting topic for a comment.
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