FMS waypoint names
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FMS waypoint names
Hi all,
I am trying to find the criteria by which non-published waypoints are named. As an example, many approaches have waypoints which show up in FMS databases that are not published on the charts. These generally occur where there is no published final approach fix on the chart (like where the navaid is on the aerodrome)
I was told that such ones as CF35 and FF35 indicats "centreline fix" and "final fix" respectively for runway 35. I would like to know how they come up with some of the others that are around such as CS, FS, FD, etc. and why one would be used as opposed to another. As an example, I regularly conduct sim sessions using Sendai and Shimojishima Japan. Both have almost identical VOR approaches, but the FMS builds the fixes using different codes. Why they are there seems pretty clear, I'm really concerned with how it's named
I have searched the net and these forums, and I am having no luck.
If anybody has a link to some info like this I would GREATLY appreciate it!!
Thanks
EM
I am trying to find the criteria by which non-published waypoints are named. As an example, many approaches have waypoints which show up in FMS databases that are not published on the charts. These generally occur where there is no published final approach fix on the chart (like where the navaid is on the aerodrome)
I was told that such ones as CF35 and FF35 indicats "centreline fix" and "final fix" respectively for runway 35. I would like to know how they come up with some of the others that are around such as CS, FS, FD, etc. and why one would be used as opposed to another. As an example, I regularly conduct sim sessions using Sendai and Shimojishima Japan. Both have almost identical VOR approaches, but the FMS builds the fixes using different codes. Why they are there seems pretty clear, I'm really concerned with how it's named
I have searched the net and these forums, and I am having no luck.
If anybody has a link to some info like this I would GREATLY appreciate it!!
Thanks
EM
Join Date: Feb 2006
Location: USA
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A few years ago, Jeppesen's Jim Terpstra wrote a series of NavData Chart articles AOPA Pilot magazine. Reprints are available here.
http://tinyurl.com/4seqg
The NavData Chart Clinic Reprints, beginning with February 2001 provides explanations of leg types and fix naming.
Additional engineering-level details are available in the ARINC 424 specs themselves. The latest draft version of 424 is available here.
http://www.arinc.com/aeec/draft_documents/424_d1s19.pdf
Appendix Five contains descriptions and illustrations of the various leg types.
Best,
Zeffy
http://tinyurl.com/4seqg
The NavData Chart Clinic Reprints, beginning with February 2001 provides explanations of leg types and fix naming.
Additional engineering-level details are available in the ARINC 424 specs themselves. The latest draft version of 424 is available here.
http://www.arinc.com/aeec/draft_documents/424_d1s19.pdf
Appendix Five contains descriptions and illustrations of the various leg types.
Best,
Zeffy
