At 11:30 PM 24/08/04 +1000, you wrote:
 Australia has chosen 10,000' as the limit, the US uses 10,000, yet they
allow up to 30 minutes 
>without oxy up to 12,000' (See
http://www.risingup.com/fars/info/part135-89-FAR.shtml).


Patrick,

You are quoting Part 135 which is the air transport regs. Part 91 is
private ops and for the oxygen requirements see Sec 91.211


Sec. 91.211 - Supplemental oxygen.

(a) General. No person may operate a civil aircraft of U.S. registry --

(1) At cabin pressure altitudes above 12,500 feet (MSL) up to and including
14,000 feet (MSL) unless the required minimum flight crew is provided with
and uses supplemental oxygen for that part of the flight at those altitudes
that is of more than 30 minutes duration;

(2) At cabin pressure altitudes above 14,000 feet (MSL) unless the required
minimum flight crew is provided with and uses supplemental oxygen during
the entire flight time at those altitudes; and

(3) At cabin pressure altitudes above 15,000 feet (MSL) unless each
occupant of the aircraft is provided with supplemental oxygen. 

Thanks for the neat link to the FARs

Mike
Borgelt Instruments - manufacturers of quality soaring instruments
phone Int'l + 61 746 355784
fax   Int'l + 61 746 358796
cellphone Int'l + 61 428 355784
          Int'l + 61 429 355784
email:   [EMAIL PROTECTED]
website: www.borgeltinstruments.com

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