If the airprox board can't tell the difference, or use the correct terminology, then we're all in trouble..
Like I said, the actual type of vehicle is important, and I would have thought the airprox board would have been more careful with their choice of words...
Nige
TBH with 140 (?) ish knots of closure on an object drone/RC helicopter size I'm not sure whether the originator of the report would really be able to tell with 100% confidence what it was, other than something went past with rotors on it, so I'd be inclined to cut the airprox board a bit of slack......