I was about 15 miles from a large airport at 7000' doing 250 knots.
Approach. N##### turn right 30 degrees. Traffic at your six o'clock, Airline 737 at 9000' with a 50 knot overtake.
Us. If he is at 9 and I am at 7 doing 250 knots how is he passing me?
Approach. Airline 123 reduce speed to 200 indicated.