Thread: Hectopascals
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Old 12th Mar 2019, 05:41
  #41 (permalink)  
Thrush
 
Join Date: Aug 2000
Location: Worldwide
Posts: 104
HPa

its all to do with the US habit of knocking off the ď2Ē so 29.91 becomes 991 on the RT.... There was an Airprox a while ago in the Shetland Isles between a US crew in a Kimg Air and an ATR. Thatís what caused it all, Iím told. The AAIB report refers.
Having said that, I went to SNN recently and the atco asked us what units we were using. Mb obv....! Well, we were tempted to say it for a bit of sport but remained professional with HPa.
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