"Julian Scarfe" wrote:

We already have trouble enough with pilots screwing up inHg to mbar
conversions.

"Jukka K. Korpela" wrote in message
. ..

So while you take the trouble, wouldn't it be best to move to something
that lasts, due to being part of a system that is meant to be applied
in all areas of life when expressing physical quantities? It's better
to move directly to the SI system as recommended in general, rather
than first moving, say, to a partly decimal-based variant of the Anglo-
Saxon system, or - to take an example about different quantities -
first move from the use of different gallons to a Unified Gallon, then
to hectoliters, later to what the SI system really recommends.

The SI is equally happy with hPa or kPa. You've pulled out a standard from
ISO, I think, that is designed to help you make a choice when there is no
reason to do differently. I agree that, if there were no other factors
influencing choice of unit, multiples of 1000 are a good default. But
you've picked on a case where there *are* clearly good reasons -- the size
of the unit, and the equivalence to mbar -- that make hPa a very sensible
and pragmatic choice.

Julian