On Sat, 24 Feb 2007 05:31:21 -0800, Sam Spade
wrote:

Roger wrote:

Some have mentioned obstacle clearance, but I'd guess it is that way
to take you across the extended centerline of the runway
Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

The preferred alignment is for the VOR radial to cross the extending
runway centerline 3,000 feet prior to the landing threshold.


Here (3BS) they picked a radial off KMBS that crosses the center of
the airport making all runways a circle-to-land. OTOH we don't have
any runways that come close to lining up with KMBS.

Without looking it over in detail it appears the geometry between MBS
and the runways at 3BS won't permit alignment within 30 degrees of any
runway centerline at 3,000 feet prior to the thresholds, or even the
alignment options permitted by VOR approach criteria..

Which gives you a circle to land on every one.
Makes it interesting when it's right down to minimums.
Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com