Thread: RNAV vectors
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  #27  
Old December 18th 06, 03:27 AM posted to rec.aviation.ifr
Stan Prevost
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Posts: 118
Default RNAV vectors


"Roy Smith" wrote in message
...
Set the GPS for Direct To SENNA course 002. Then turn ten degrees and
join
the final approach course. Complies with the clearance.


Stan,

Just curious why you picked SENNA and not FRZZN as the waypoint. From
"Turn left 10 degrees to intercept the final approach course", I'd assume
I'd intercept outside of FRZZN, but perhaps not outside of SENNA. I would
think -D- FRZZN with a course of 002 would make more sense.


In Steven's original scenario, the intercept was way south, so I didn't
worry about it too much and didn't give it too much thought, as it wasn't
important to the point under discussion. I don't see any reason that FRZZN
wouldn't work, although having SENNA as a waypoint provides a definite point
where you are established on a published segment of the approach and can
begin descent in accordance with the published procedure. Your clearance
will also contain an altitude to maintain until becoming established on a
published segment. If you are close enough that you might intercept inside
SENNA, the TO waypoint will switch to FRZZN when you pass by SENNA, serving
the same purpose.