Flypast Timings
Reminds me of the year when I believe the French were doing a flypast at the Lord mayor's Show in London and the problem of how to get the flypast and the General Salute to coincide because comms difficulties prevented alerting the parade commander by radio. The solution: the Lord Mayor was briefed and doffed his hat when the formation was x seconds out. When the parade commander saw the Mayor doff his hat, he ordered the "General Salute." Worked like a box of birds. Remember the KISS principle.