LCY Cable Car
"How low do they think aircraft are at 2 DME on a 5.5 degree approach (answer about 1,100 feet)."
But how high are the towers ?
The north main tower (admittedly 275m south of the runway centre line) is 93m above ordnance datum and is just scraping the bottom of the the take-off control surface - in fact that seems to be the constraint on its design.
The north intermediate tower (115m south of the runway) is 66m AOD.
It seems odd to me that the take-off surface is lower than the approach surface.