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 > >
