TBA/SBA both had fan markers. The reason for the 'fan' was so that somebody who was struggling to sort out the drift to stay on the centre line had a fighting chance of hearing it went he went past. IIRC passing the inner marker without a steady noise was a mandatory overshoot.
I saw the poor old BABS van at Aldergrove being crushed by a Halifax in about 1949. The van fought back by removing the port oleo resulting in the Halifax sliding along the runway sans mainwheel and attachments. As the Halifaxes were approaching the end of their service life it was then a one way trip to the dump.
Halifax 1 BABS Van 1
Last edited by Fareastdriver; 17th February 2015 at 21:13.