From: Andy R. <an...@pl...> - 2001-09-23 18:08:20
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[Hrm... this appears to have not made it to the list. Apologies if someone gets it twice.] David Megginson wrote: > I'm still not sure that I understand the original problem. In all of > the approach plates I've looked at (only a few hundred, granted), I've > *never* seen a reversible ILS (I don't have the plates for O'Hare, so > I cannot check that instance). > > I have seen non-precision back-course approaches for ILS, as Alex > mentions, but those are an entirely different thing. In cases where > both ends of a runway have ILS approach, they have separate > frequencies as far as I've seen. > > Can anyone post an example of an approach plate with a reversible ILS? Hark! I hear the call for a perl script! The attached script wanders through the default.ils in the base package looking for airports which share a single ILS frequency across multiple runways. The output follows. Almost all of these are for opposite runways, but in at least one case (LFRD) there is a frequency shared across THREE runways (18, 36, and 35). Andy KFTW 109.90: 16L 34R LSGG 109.90: 05 23 KLCK 110.10: 05R 23L KSMF 111.10: 16R 34L LFOT 109.90: 02 20 KHOU 111.30: 12R 30L LFPM 110.50: 11 29 LFPO 110.30: 02 02L KHPN 109.70: 16 34 KAFW 110.15: 16L 34R KAGC 109.10: 10 28 KCAK 109.50: 01 19 LFQV 109.50: 11L 29R LFRB 109.90: 08 26 LFRD 109.70: 18 35 36 YMML 109.70: 16 34 LFRO 109.50: 11 29 KLGA 108.50: 13 31 LFRZ 108.50: 08 26 LFSN 108.50: 03R 21L KFYV 111.90: 16 34 KCEF 109.90: 05 23 KLIT 110.30: 04L 22R KALB 109.50: 01 19 EDHK 109.50: 08 26 KSUS 111.90: 08R 26L YSCB 109.50: 17 35 X68 109.50: 15 33 KPBI 111.90: 09L 27R KSYR 109.90: 10 28 KPDX 111.30: 10L 28R LEAL 110.30: 10 28 KCMH 108.70: 10R 28L KYIP 109.50: 05R 23L EHDL 109.15: 02 20 KAUS 110.50: 17L 35R KAUS 110.30: 17R 35L KPHL 108.95: 09L 27R KPHL 109.30: 09R 27L KWRI 110.10: 06 24 KAVP 109.90: 04 22 KPIA 109.90: 13 31 KPIT 111.70: 10L 28R KPIT 108.90: 10R 28L KYNG 110.10: 14 32 KELM 109.10: 06 24 KELP 111.50: 04 22 KCRP 110.30: 13 31 KIAD 110.10: 01R 19L KIAD 111.30: 01L 19R KIAH 110.90: 09 27 KIAH 109.70: 08 26 KIAH 111.90: 14L 32R KCRW 110.30: 05 23 RODN 108.50: 05L 23R KRIC 110.70: 16 34 KERI 110.30: 06 24 LEMD 109.90: 15 33 YSRI 110.70: 10 28 LICR 109.30: 33 33 KVBG 110.10: 12 30 YSTW 109.90: 12L 30R PHNL 109.10: 26L 26L EHRD 108.30: 06 24 KBAD 109.90: 15 33 KEVV 109.90: 04 22 KROC 110.70: 04 22 EHSB 110.00: 09 27 KEWR 110.75: 04L 22R KEWR 108.70: 04R 22L KPVD 109.30: 05 23 KILN 109.35: 04R 22L KILN 110.70: 04L 22R XAUS 109.50: 13R 31L KPWM 109.90: 11 29 KBDL 111.10: 06 24 KIND 110.50: 14 32 ESSU 110.90: 18 36 KMBS 108.70: 05 23 ZSSS 110.30: 18 36 KMCC 109.70: 16 34 KBED 111.15: 11 29 KMDT 110.90: 13 31 KMDW 109.90: 13C 31C KDAL 111.10: 13R 31L KDAL 111.50: 13L 31R KBGM 110.30: 16 34 KISP 108.30: 06 24 KMHT 109.10: 17 35 KDEN 111.55: 07 25 KDEN 108.50: 17R 35L KDEN 108.90: 08 26 KDEN 111.10: 16 34 KDEN 110.15: 17L 35R KDET 111.30: 15 33 EGBB 110.10: 15 33 KDFW 111.90: 18R 36L KDFW 110.30: 17C 35C KDFW 110.55: 18L 36R KDFW 111.35: 17R 35L KDFW 111.75: 17L 35R KBLV 111.15: 14L 32R KMKE 111.50: 07R 25L KMKE 110.30: 01L 19R EGCC 109.50: 06 24 CYVR 110.55: 08L 26R KMLI 110.50: 09 27 KMLU 109.50: 04 22 KBOS 110.70: 15R 33L KBOS 110.30: 04R 22L CYYJ 108.70: 09 27 CYYZ 110.95: 15R 33L EGGD 110.15: 09 27 EGGP 111.75: 09 27 EGGW 109.15: 08 26 KFFO 109.70: 05L 23R KOKC 110.90: 17L 35R LFBG 109.90: 05L 23L LFBM 110.50: 09 27 LFBV 109.50: 14L 32R EGJB 108.10: 09 27 EIDW 108.90: 10 28 KMRY 110.70: 10R 28L KSAN 110.90: 09 27 LFCR 110.75: 13L 31R KSAT 110.90: 12R 30L KMSP 110.30: 11R 29L EGKK 110.90: 08R 26L KDOV 111.90: 01 19 KMSY 109.90: 10 28 KSBN 109.30: 09R 27L YBAS 109.90: 12 30 EGLC 111.15: 10 28 KMTN 110.70: 15 33 KONT 109.70: 08L 26R EGLL 110.30: 09L 27R EGLL 109.50: 09R 27L KBWI 111.70: 15R 33L KBWI 111.95: 15L 33R KBWI 109.70: 10 28 KSDF 109.35: 17R 35L YMAV 109.50: 18 36 KSEA 111.70: 16R 34L EGNM 110.90: 14 32 LFGJ 109.70: 06 24 KORD 110.10: 04R 22L KORD 111.10: 09R 27L KORD 111.30: 04L 22R KORD 110.50: 09L 27R KORF 109.10: 05 23 KORH 110.90: 11 29 EGPD 109.90: 16 34 KFNT 109.90: 09 27 EGPF 110.10: 05 23 EGPH 108.90: 07 25 EGPK 110.30: 13 31 KDTW 111.50: 03R 21L KDTW 110.70: 03L 21R LFJL 111.75: 04 22 YMES 109.50: 04 22 KSHV 110.30: 14 32 KUCA 109.30: 15 33 KSJC 110.90: 12R 30L KJFK 110.90: 04L 22L KJFK 111.50: 13L 31R KJFK 109.50: 04R 22R EGSS 110.50: 05 23 LFLP 108.90: 04R 22L EINN 109.50: 06 24 LFMH 110.90: 18 36 LFMM 109.90: 14 32 KLAX 111.70: 06R 24L KLAX 108.50: 06L 24R KLAX 111.10: 07L 25R KLAX 109.90: 07R 25L KDYS 109.90: 16 34 KSLC 111.90: 16R 34L KSLC 109.50: 16L 34R KADS 110.10: 15 33 KFTG 110.90: 17 35 -- Andrew J. Ross NextBus Information Systems Senior Software Engineer Emeryville, CA an...@ne... http://www.nextbus.com "Men go crazy in conflagrations. They only get better one by one." - Sting (misquoted) |