I heard the Aberdeen 92 flying today. ATC advised other traffic that it would be slowing to 120 overland for noise reasons so TheTruth's comment seems to be true.
I wonder where this is coming from? Could it be that there is some limitation imposed by its noise certificate? I would have thought that the noise wouldn't change that much between 120 and 140 or so - and at 140 you are past sooner. Anyone have any info?
HC