Doc /3. MANUAL OF THE. ICAO STANDARD ATMOSPHERE extended to 80 kilometres ( feet). MANUEL DE. L’ATMOSPHÈRE TYPE OACI. ICAO DOC Manual of the ICAO Standard Atmosphere (extended to 80 kilometers) ( feet) Ed 3. This manual provides standard values of.  The International Standard Atmosphere is defined in. ICAO Document /2. The ISA assumes the mean sea level (MSL) conditions as given in Table 1.
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Where is it officially documented?
Where is this officially documented? I’ve tried to search the forum with ” Ddoc be there’s a trick I don’t know about to do a search for numbers. International Standard Atmosphere – Wikipedia, the free encyclopedia http: I thank you for the link, but it’s of no help at all.
Obviously my English is not good enough and my question was not understood. My questions refers to aviation altimeters. When set to My other question is: And where is it documented. May last question is: What iccao the QNH?
ICAO DOC 7488 CD
And where is it officially documented? When two altimeters are required for the category of operation, one of the altimeters must read the nominated elevation to within 60FT. When the remaining altimeter has an error between 60FT and 75FT, flight under the IFR to the first point of landing, where the accuracy of the altimeter can be re-checked, is approved.
In the event that the altimeter shows an error in excess of 60FT on the second check, the altimeter must be considered unserviceable for flight under the IFR. The accuracy of altimeters appears to be more a question of certification standards, and I very much doubt there will be any ICAO standard or recommended practice SARP pertinent to this question.
At least this what ICAO requires; of course Bloggs has already mentioned national requirements which may be different. If I understand correctly: If it doesn’t, it isn’t a “sensitive altimeter”! voc
Hence I think that the answer to your question is actually the definition of the standard atmosphere – which I know you have already studied. That definition is found in any meteorological textbook or dictionary, and is internationally accepted just as the values for ISA are internationally accepted.
International Standard Atmosphere explained | Carlos Rodríguez Román –
As an aside, QFH is the pressure at the measuring station, reduced to sea level according to the actual temperature of the air. Aviation is not interested in QFH. Each ICAO State will publish maintenance standards which altimeters must meet when undergoing bench testing every two years or so.
If dlc your regulator nor your Ops Manual states a pre-flight accuracy checked before take-offyou might consult your icqo maintenance regulations. Hope that helps, O8.
ICAO Altimeter [Archive] – PPRuNe Forums
There is of course a standard laying down the specifications which an altimeter has to be designed and manufactured to in order to be dov. Unfortunately, it is one of those non-free standards which will set you back a significant amount. Could have been an SAE one, can’t quite recall. The operational checks recommended are something entirely different.