Rules for interpreting met info - pre flight
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Rules for interpreting met info - pre flight
Does anyone have a quick reference sheet for the application of met info for pre flight planning purposes. Or an easy to remember quick set of rules!
EASA rules I should add.
Thanks in advance.
EASA rules I should add.
Thanks in advance.
It's meant to be GM1-CAT.OP.AH.180 Selection of aerodromes - aeroplanes APPLICATION OF AERODROME FORECASTS which you'll find on page 210 of the CRD b.3 document that was published as part of the CRD. However, I believe that contains some errors if it's meant to be consistent with the old JAR-OPS1 IEM.
The AMC/GM will presumably be finalised as a Decision only when the Ops regulation is finally published.
The AMC/GM will presumably be finalised as a Decision only when the Ops regulation is finally published.
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OUR Manual says,
Precision Appr. RVR or Visibility counts
Non.Prec : RVR / VIS AND Ceiling
BECMG AT :
Deterioration: Applicable for the whole time
Improvement : applicable
-steady windspeed must be within limits. Gusts may be disregarded.
BECMG FROM - TO:
Deterioration: Applicable from start.
Improvement: Applicable from the end
TEMPO FROM/TO AT PROB30/40:
Deterioration:
Transient Cond. (shower): Not applicable. Wind may be disregarded.
Persistent cond. (haze, fog): applicable.
Improvement:
Should be disregarded:
PROP TEMPO:
Deter: Should be disregarded.
Impr: may be disregarded.
In any Case: Gust may be disregarded.
BECMG: BAD FROM THE START.
GOOD FROM THE END.
TEMPO: LONG LASTING = BAD
SHORT TIME = NOT THAT BAD.
PROP TEMPO: I don't care.
greetings
Precision Appr. RVR or Visibility counts
Non.Prec : RVR / VIS AND Ceiling
BECMG AT :
Deterioration: Applicable for the whole time
Improvement : applicable
-steady windspeed must be within limits. Gusts may be disregarded.
BECMG FROM - TO:
Deterioration: Applicable from start.
Improvement: Applicable from the end
TEMPO FROM/TO AT PROB30/40:
Deterioration:
Transient Cond. (shower): Not applicable. Wind may be disregarded.
Persistent cond. (haze, fog): applicable.
Improvement:
Should be disregarded:
PROP TEMPO:
Deter: Should be disregarded.
Impr: may be disregarded.
In any Case: Gust may be disregarded.
BECMG: BAD FROM THE START.
GOOD FROM THE END.
TEMPO: LONG LASTING = BAD
SHORT TIME = NOT THAT BAD.
PROP TEMPO: I don't care.
greetings
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Perhaps I should have been more specific, It is indeed an application of aerodrome forecast table I was looking for.
Thanks to those who posted helpful comments.
Thanks to those who posted helpful comments.
Whens the last time you didnt go because of weather???
Quite agree with the comment about rules over common sense, it is only a prediction of what will happen and those predictions are often wrong. Whatever the rules might say about which bit of a forecast you can disregard you had better be careful heading for an area where the weather is filthy, and the forecasting not that great.
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application of aerodrme forecast table -
Until the EASA OPS AMC published next year, and until the derogations expire in your particular EU state, try this;
JAR OPS 1 sub part D OPS AMC 1.297
JAR OPS 1 sub part D OPS AMC 1.297
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JAR OPS isn't applicable since 2008, EU OPS replaced it back then. Should have it's own AMC, usually as an appendix to the relevant OPS number. EU OPS 1.297 is still correct though and contains tables and explanations which planning minima have to be used.