Bhx Rw15 Sid
Watching the southerly departures from BHX the other day I noticed that they all turned right (i suppose about 20 - 30 degrees) before rolling back to wings level or in some cases turning left (presumably heading north.)
I take it this is part of the departure procedure out of 15 but I was wondering what influences it?
Is it noise abatement? A right turn after takeoff takes a/c CLOSER to the populus....?
Is it that a/c have to intercept a HON radial as part of the SID?
Just curious. Thanks in adv.