Most interested in 3Point's experience with the CAA. Because I don't mind displaying my ignorance here (I won't get any more flak than when I'm right!!).
I always thought a heading instruction should be maintained as stated, but that the purpose of the extra words "To close the Localiser" was to allow you to make those sort of corrections if the closure wasn't working out.
[Edited to add]: Just checked MATS (10.5.2) and the phrase is "Aircraft should be vectored either onto the Localiser or given a closing heading enabling the pilot to complete the turn on". That's where I got the idea that the word "closing" had that particular meaning.
3Point's CAA man may not have liked it but from my experience of working with them they're not always right, you know. (And to be fair, they don't always claim to be).
Last edited by keithl; 11th Oct 2005 at 11:15.