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List of abbreviations: Difference between revisions
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| OAT || <u>O</u>utside <u>a</u>ir <u>t</u>emperature || the temperature of undisturbed air, derived by correcting TAT for compressibility errors | | OAT || <u>O</u>utside <u>a</u>ir <u>t</u>emperature || the temperature of undisturbed air, derived by correcting TAT for compressibility errors | ||
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| OBS || <u>O</u>mni <u>b</u>earing <u>s</u>elector || part of a VOR gauge, used to rotate the course card | | OBS || <u>O</u>mni <u>b</u>earing <u>s</u>elector || part of a [[VOR]] gauge, used to rotate the course card | ||
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| OM || <u>O</u>uter <u>m</u>arker || part of ILS, beacon that provides range information, 4-7NM from runway threshold | | OM || <u>O</u>uter <u>m</u>arker || part of ILS, beacon that provides range information, 4-7NM from runway threshold | ||