On 10/7/2005 00:23, Greg Farris wrote:

In article ,
says...


"Greg Farris" wrote in message
...

OK - the VOR is not exactly on the runway centerline - maybe two runway
widths off. Is that the reason then? Are we sure, or just guessing?

G Faris


We are not guessing.



That's good. I wrote here with my question because I was sure I would find an
informed response. So are you telling me, without a doubt, that the 12° offset
on this approach, as well as similar offsets on many non-precision approaches
is so that the MAP will fall on the runway extended centerline - and you can
point to documentation to support this?

I ask you in this manner because I agree with Matt Whiting that this does not
appear to be a plausible explanation, and there must be another.

G Faris


Greg,

I think you're going about this all wrong. The design of the approaches,
etc. is based on a number of factors. Primarily TERPS, which is the 'rule
book' for designing approaches. These 'rules' must take into account several
factors, including terrain, local controls (politics), other runways, other
airports, availability of navaids, etc.

It's not up to the Pilot to determine *why* the approach was designed the
way it was, only to correctly interpret the procedure and fly it safely.



--
Mark Hansen, PP-ASEL, Instrument Airplane
Sacramento, CA