A few years ago, the owner of a PA28 had a strange system in which he used two traffic cones in conjunction with two tie-down ropes to secure his aircraft to a tie-down line.
Whilst doing a bit of instrument flying with an instructor, they found themselves carrying out a go-around following an ILS at Farnborough. The Farnborough controller said "... what are those orange things you seem to be towing around the skies?"
The instructor and student quietly made their way back to White Waltham. Once they'd parked their PA28 at their original starting position they discovered a tie-down rope with a traffic cone still attached to one of the aircraft's tie-down points.
They never did find the other one.
