Re: [Flightgear-devel] nontrivial external situations (was: Glideslope bugs/improvements)

2009-09-15 Thread James Turner
On 15 Sep 2009, at 13:15, John Denker wrote: Constructive suggestion: Seriously, unless/until we can do a reasonable job of switching the reversible ILS, it would be better to not switch it at all. In particular, it would be better to just settle on one end or the other and stick with it

Re: [Flightgear-devel] nontrivial external situations (was: Glideslope bugs/improvements)

2009-09-15 Thread Thomas Betka
I am confused... what the heck is a reversible ILS? In 25 years as an instrument pilot and over 20 as an instrument instructor--I've never of such a thing. Localizer beams are not reversible. They are horizontally polarized, but not reversible. Reference the FAA Instrument Flying Handbook,

Re: [Flightgear-devel] nontrivial external situations (was: Glideslope bugs/improvements)

2009-09-15 Thread James Turner
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

Re: [Flightgear-devel] nontrivial external situations (was: Glideslope bugs/improvements)

2009-09-15 Thread Thomas Betka
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

Re: [Flightgear-devel] nontrivial external situations (was: Glideslope bugs/improvements)

2009-09-15 Thread Thomas Betka
Actually those are DMEs. Look at the approach plate I referenced in the email I just sent--I just noticed something I missed...this statement: Procedure not available without DME I-TH or radar It's in the text box towards the top of the plate. I missed this, because it's generally *not* done