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Lead in Bearing VOR settings for DME approaches
pannier
Topic Author
pannier created the topic: Lead in Bearing VOR settings for DME approaches
Dear Forum,
Just a q regarding one of the sample IREX questions from CASA.
This one concerns the (I think now removed/defunct) Pinja One arrival for RWY 06 on the 9DME at GOSSI (I think now removed as well...can't see it on a 06 VOR plate). Q asks settings for a 5 degree lead for arrival at GOSSI.
I am assuming that GOSSI is the point at which the radial is intercepted for 06 (068 is the radial).
Would the correct VOR settings to advise you of arrival at that point be
1. 243 radial on the OBI (reciprocal of (068 minus 5), assuming a clockwise DME arc,
2. From flag set
3. CDI centered
On the current VOR 06 plate, the Lead rating is set at 236 degrees. Is there any usual or set value for the difference between the lead bearing and the actual radial for the RWY approach?
bobtait replied the topic: Lead in Bearing VOR settings for DME approaches
The lead bearing allows for the radius of turn to prevent an overshoot of the final approach track. The published lead bearing is really considering a typical RPT type aircraft and so it allows for a fairly large turn radius. Most GA pilots would use a lead bearing closer to the required final approach track - about half the published. There is no requirement to use the published lead. Your suggestion would be OK.
