ATIS info
Thread Starter
Joined: Mar 2007
Posts: 170
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From: NSW- 3rd world state
ATIS info
Hello,
I'm after some info please if anyone can assist please. I'm an Aust. ATC and with our ATIS we advertise air pressure as QNH. Where I work, we have recently started adding inches of Mercury as well as QNH and was wondering how this is broadcast in the US, both directly to aircraft and on ATIS.
From memory here years ago with visiting US aircraft we used to say "Altimeter 2995".
I can't remember if we included the decimal point or the "inches of mercury".
Any advice of what you do would be great.
Thanks
I'm after some info please if anyone can assist please. I'm an Aust. ATC and with our ATIS we advertise air pressure as QNH. Where I work, we have recently started adding inches of Mercury as well as QNH and was wondering how this is broadcast in the US, both directly to aircraft and on ATIS.
From memory here years ago with visiting US aircraft we used to say "Altimeter 2995".
I can't remember if we included the decimal point or the "inches of mercury".
Any advice of what you do would be great.
Thanks
Joined: Nov 2007
Aviation Qualifications: ATPL
Posts: 1,954
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From: Texas
The US announces to the world in the differences from ICAO section of our Aeronautical Information Publication that we use inches of mercury. Then in our Aeronautical Information Manual and in the weather Advisory Circular 00-45G it is stated that the altimeter setting will be given as a 4 digit number, tens, units, tenths and hundredths of inches of mercury. The decimal point is not coded. What you'll hear on the ATIS or from ATC is "Altimeter Two Niner Niner Two" or "Altimeter Three Zero One Four." Always 4 digits preceded by "Altimeter" but no "Point" or "Decimal" in the middle.
Joined: Aug 2006
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From: Timbukthree
Freqs used to be given in decimals, quite redundant. Altimeter setting in inches of mercury (QNH) cannot be anything other than values such as 2992, or 3014, or 3000, or 2898, I say again 2898. It has to be repeated above and below certain parameters. Been that way for a couple of decades...The decimal is understood and redundant. Same as VHF Freqs. Yawn.
Joined: Dec 1998
Posts: 4,282
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From: Escapee from Ultima Thule
Not quite. The word 'point' is commonly used instead of 'decimal' for radio frequencies. Much better, I think. Never bothered checking the pilot-controller glossary or equivalent ATC manual to check if it's correct or not.
Thread Starter
Joined: Mar 2007
Posts: 170
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From: NSW- 3rd world state
Yawn, thanks for that. Nice reply.
I asked the original question as I work on the other side of the planet where it is a legal requirement for me to include the decimal point in all freq's.
In addition, we dont include Altimeter on the ATIS, we advertise QNH.
That's why I asked how Altimeter is broadcast on ATIS in the US because its a recent change where I work, that I now need to include on ATIS, as well as QNH.
I asked the original question as I work on the other side of the planet where it is a legal requirement for me to include the decimal point in all freq's.
In addition, we dont include Altimeter on the ATIS, we advertise QNH.
That's why I asked how Altimeter is broadcast on ATIS in the US because its a recent change where I work, that I now need to include on ATIS, as well as QNH.
