That's an interesting idea, though IIRC there is no requirement in the rules for aircraft to move at all... you could just as easily leave an on-station Spotter "hovering" in one place, and simply assume it's circling there to maintain spotting position on the opposing fleet.
I do agree Spotters need to be faster, though. On our group's list of "things to do" are accurately-figured speeds for Spotter Flights, but we haven't played another game lately so we haven't gotten around to it yet.
(Don't you hate it when Real Life cuts into the important things in life, like gaming time? :twisted: :lol: )