In article et,
"Steven P. McNicoll" wrote:

"Bruce Hoult" wrote in message
...

I did not mention the FAA at all. I mentioned the training I received.


Yes, in response to a comment on the FAA requirement.

Yes, pointing out that altitudes and durations where oxygen is required
are, like automobile speed limits, is not a hard and fast
physically-significant thing but rathe a matter of someone's opinion,
and that opinions differ in different places.

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Bruce | 41.1670S | \ spoken | -+-
Hoult | 174.8263E | /\ here. | ----------O----------