DRJAD,
Ah paying too much attention.
I hadn't noticed the slip when proof reading, but then I am but a passing ship to the complexities of the ILS, despite the one down many to go.
It just so happens that my next trip is a nav route involving NDB's but I have just reached the same section in my ATPL notes. I now have a vague inkling of the inner workings, but can anyone help me out as to why some stations need BFO (beat frequency oscillator) selected on to ident and others off. I think it relates to the fact that NON A1A beacons (long range, offshore etc.) interupt the carrier wave to carry the ident and NON A2A don't.
Answers on postcard or this thread please,
My Tuesday flight was cancelled so it's a little wait for the next one, but my head is in the books again.
Obs cop