"Gene Nygaard" wrote in message
...
On Sun, 7 Mar 2004 16:18:10 +0000 (UTC), "Jukka K. Korpela"
wrote:

(Pat Norton) wrote:

Do all commercial aircraft that fly in and out of North America have
dual unit altimeters (hPa and inHg)?

I don't know about that, but as regards to the metric system, I would
like to mention that using hPa is _not_ the recommended way. Although
the "h" prefix is formally part of the SI system, it's regarded as
unsuitable by many, including NIST.

In practice, using hPa means being just _nominally_ metric, i.e. using
actually millibars but under a different name. The odd thing is that
the correct kPa would be more practical.

Amen.


What about the pieze = 1000 pascals?