US Aviation does use inHg, however on upper air charts, they are in Hpa levels (constant pressure level charts), decameter altitudes and Celsius temperatures only, all by the NWS. All airport temperatures are in Celsius everywhere. I've found that at a lot of airports, pilots have a choice of looking at Metars or the old SA's. many choose the latter which gives temperature in Fahrenheit. But at least we have the choice.
On another subject, recently flew on Lufthansa, in their inflight magazine all articles in English use feet and inches which irks me, I had to refer to the German side to get metric units. Same goes for the airshow, moving map display with altitude temperature and distance on it. I'm writing to complain. Believe i already complained about this last year. Mike Payne Potomac Falls Virginia > [Original Message] > From: Han Maenen <[EMAIL PROTECTED]> > To: U.S. Metric Association <[EMAIL PROTECTED]> > Date: 15/12/02 13:01:19 > Subject: [USMA:24000] Re: hPa > > Doesn't US aviation use the inch of mercury 99% of the time? The US has > rejected international METAR/TAFs, because they are too metric as they do > not use inHg, visibility in yards and statute(!) miles etc. etc. > > Han > . > > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > To: "U.S. Metric Association" <[EMAIL PROTECTED]> > Sent: Sunday, 2002-12-15 1:13 > Subject: [USMA:23987] hPa > > > > 2002 December 14 > > Do not say the US National Weather Service prefers hPa over kPa. > The Federal Aviation Administration made the call. FAA did this for safety. > The numbers for mbar and hPa are the same. > Given that aviation in the USA uses hPa, NWS uses the same unit > > for the general public. > > Robert Bushnell, PhD PE > > Meteorologist > > chair ASTM committee E43 on SI Practice > > > > --- Michael Payne --- [EMAIL PROTECTED] --- EarthLink: The #1 provider of the Real Internet.
