While my aviation expertise does not include foreign approach plates, there should be some degree of standard between designations world- wide. Thus I believe those are the designators of either the actual marker beacons, just off the runway...not the LOC itself. From what I can tell, there is only *one* LOC there.
Check out this PDF: http://myweb.tiscali.co.uk/egpfgla/airportinfo/editaxi.pdf That small symbol I think you are referencing in the PDF you linked, is indicating the location of the DME transmitter, and the frequency it is associated with (a LOC, in this case). DME transmitters co- transmit on the NAV frequency, so you tune the DME simply by tuning the VOR/LOC frequency in your NAV radio. Now look at this approach plate: http://www.nats-uk.ead-it.com/aip/current/ad/EGPH/EG_AD_2_EGPH_8-6_en.pdf The localizer for runway 24 has the frequency you referenced (108.90), and thus the DME is located on-field and is required for use on the approach, per the name ILS/DME/NDB. Also, the fact that the small symbol is located to the side of the runway indicates that this is NOT an ILS approach...as a precision approach could not have a localizer misaligned with the runway centerline. So to your point--YES, the I-VG & I-TH "share" the same frequencies-- but those are not different localizers. There is only one localizer pictured there, and it's frequency is 108.90. Rather I think those symbols are actually marker beacons at either end of the runway, as shown on the PDF that linked to in your response (just off either end of the runway). TB On Sep 15, 2009, at 5:11 PM, James Turner wrote: > > On 15 Sep 2009, at 22:59, Thomas Betka wrote: > >> But each LOC >> on an airfield has it's own frequency > > This is where the problems start: > > http://www.nats-uk.ead-it.com/aip/current/ad/EGPH/EG_AD_2_EGPH_2-1_en.pdf > > IVG and ITH share the same frequency - 108.9Mhz, and there's some > circuit/switch/etc in the tower to activate one DME/LOC/GS trio or the > other. > > Aside from that, I think everything you said was correct - as ever, I > am not a pilot. > > The good news is, I think I've come up with a more consistent > heuristic (to make Curt happy!) than the current one. > > Regards, > James > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart > your > developing skills, take BlackBerry mobile applications to market and > stay > ahead of the curve. Join us from November 9-12, 2009. Register > now! > http://p.sf.net/sfu/devconf > _______________________________________________ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
