Not all of them at the same time. It depends upon how many pilots are on the fli...

_wwz4 on April 28, 2017 | parent | context | favorite | on: DHL pilot alleges poor labor practices that are sp...

Not all of them at the same time. It depends upon how many pilots are on the flight; but observing while auto-pilot is engaged only takes one person. The other people can relax, nap, read, etc.