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Chris B
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Bar Bar MilliBars

Post by Chris B » Wed Jun 01, 2011 6:03 pm

http://www.caa.co.uk/application.aspx?c ... il&id=4560

The purpose of this Information Notice is to notify the adoption of the hectopascal (hPa) as the unit of measurement for atmospheric pressure within the UK with effect from 17 November 2011. This information will also be promulgated by Aeronautical Information Circular.
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Bob F
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Post by Bob F » Wed Jun 01, 2011 6:58 pm

"A rose by any other name would smell as sweet"

I see no abbreviation of hectopascal will be allowed in RT, will we have to say it with a French accent? - not trying to be "grave" just "acute"!
Bob Farrell
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John Price
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Post by John Price » Wed Jun 01, 2011 7:16 pm

IMHO

What a complete waste of time and money.

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macconnacher
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Post by macconnacher » Thu Jun 02, 2011 8:58 am

It doesn't change the numbers. The US has been using Inches of mercury for years which is why until now when you say a pressure over the RT you have to say millibars after any value less than 1000 to avoid confusion.
It has been officially hectopascals for years in the scientific community and is noted as such in my 2005 edition of CAP452 dated 2005 with a note that the UK will use the millibar for the forseable future. Perhaps with this change we will not need to use the term even for pressures below 1000hPa so just "QFE 998".
Stuart Macconnacher
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JonKil
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Post by JonKil » Sun Jun 05, 2011 12:09 pm

Southern Ireland has been using hectopascal (hPa) for as long as I can remember. Nothing changes, just the name.
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