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#11
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Why are some NDBs not displayed on Low Alt Enroute Charts?
"Dave Butler" wrote in message news:1146665519.212250@sj-nntpcache-5... PETIS NDB doesn't seem to have an enroute function, but PETIS reporting point does. The two are very nearly, but not exactly colocated. Note that PETIS reporting point is not defined from the NDB, but rather by 4 different methods using two VORs and 2 localizers. Navaid identifier: SB type: NDB name: PETIS city: SAN BERNADINO state: CA latitude: 34-03-23.285N longitude: 117-21-58.014W elevation: 0 magnetic variation: -14 Fix identifier: PETIS state: CA use: REPORTING POINT latitude: 34-03-23.290N longitude: 117-21-58.010W VOR HDF, radial 317.77 VORTAC PDZ, radial 029.62, DME 11.63 ILS/DME I-ONT, radial E CRS, DME 12.86 ILS I-SBD, radial SW CRS Very nearly, but not exactly collocated? Let's see, running those coordinates through an online distance calculator shows the distance between them to be 0.0000887267 NM. That's less than 6 1/2 inches. That's smaller than any NDB antenna I've ever seen, I'd say they ARE exactly collocated. |
#12
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Why are some NDBs not displayed on Low Alt Enroute Charts?
Steven P. McNicoll wrote:
"Dave Butler" wrote in message news:1146665519.212250@sj-nntpcache-5... PETIS NDB doesn't seem to have an enroute function, but PETIS reporting point does. The two are very nearly, but not exactly colocated. Note that PETIS reporting point is not defined from the NDB, but rather by 4 different methods using two VORs and 2 localizers. Navaid identifier: SB type: NDB name: PETIS city: SAN BERNADINO state: CA latitude: 34-03-23.285N longitude: 117-21-58.014W elevation: 0 magnetic variation: -14 Fix identifier: PETIS state: CA use: REPORTING POINT latitude: 34-03-23.290N longitude: 117-21-58.010W VOR HDF, radial 317.77 VORTAC PDZ, radial 029.62, DME 11.63 ILS/DME I-ONT, radial E CRS, DME 12.86 ILS I-SBD, radial SW CRS Very nearly, but not exactly collocated? Let's see, running those coordinates through an online distance calculator shows the distance between them to be 0.0000887267 NM. That's less than 6 1/2 inches. That's smaller than any NDB antenna I've ever seen, I'd say they ARE exactly collocated. 0.0000998688619566808 nm, or a little over 7 inches, by my calculation. Point taken. They are collocated. Thanks for correcting my spelling, too. Dave -- Dave Butler, software engineer 919-392-4367 |
#13
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Why are some NDBs not displayed on Low Alt Enroute Charts?
Did you use the link to the charts I provided for you?
Jim Macklin wrote: Don't know, don't have that chart. "Sam Spade" wrote in message news:VoK5g.175045$bm6.45600@fed1read04... | Jim Macklin wrote: | A NAVAID is shown on a chart if it has a function on that | chart. Enroute charts don't show NAVAIDS that only serve an | IAP, and IAP charts don't show all the enroute NAVAIDS in an | area. | The NDB in question has some enroute function, perhaps a | bearing or even a route segment. | | | Could you be more specific about the case in point? What en route | function does PETIS have? |
#14
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Why are some NDBs not displayed on Low Alt Enroute Charts?
Jim Macklin wrote:
Don't know, don't have that chart. My web site reference now has the official FAA form for Petis NDB/INT in addition to the Jeppesen Charts. It is charted on the area chart, but not the enroute chart, because it serves several STARs. If you've never seen the source document for a fix, you might find it of some interest. It also documents the holding patterns authorized for ATC's use and whether a pattern is to be charted. |
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