They give us three numbers, such as 33 35 38, for the thirds of the
runway. It was an attempt a few years ago to standardize the runway
condition so the number means the same thing to everybody and removes
the subjectiveness of braking action fair. It is so useless we don't
put it on the ATIS anymore and when we get asked for the runway
condition we give it to them in the old way, good, fair, etc. Nobody
ever asks for the mu number. Ever.



Jose wrote:
Yes, our airport can report in mu. I have yet to find the airline
pilot who finds those three numbers useful. They always ask for the
standard braking action report.


I've never heard of mu numbers in this context. How are they used?

Jose