Procedural approaches have a protected obstacle-free area that extend well beyond the line drawn on the charts. The line on the chart is for guidance only at certain assumed TAS/ nil wind situation. The protected area narrows down according to certain formulae depending on which portion of the approach you are in and how close to the threshold (on final) you are.
Pull the relevant ICAO docs on procedure design if you're really interested, however I can assure you they're a bit dry...
cheers!
foggy.
Having re-read the thread, i can see that it is about holds and not, as its title suggests, procedure turns, or procedural instrument approaches as assumed. So please ignore my random wibblings above. That's the danger of skim-reading
Last edited by foghorn; 8th November 2002 at 14:19.