It is a localizer for tracking purposes, and not for approach purposes (other than the missed) it's in very mountainous terrain, and serves as relatively precise guidance through and over a mountain pass. It's oriented as it is, providing back course guidance to give normal sensing on the way out on the departure and missed approach procedures. It isn't flown as a back course to the airport, and neither is the front course it's located physically on the other side of a mountain from the Aspen airport there are big rocks between the airport and the transmitter. It's installed this way to provide normal sensing while flying outbound, as the I-PKN localizer back course is used for a departure, and the missed approach for the LOC/DME-E, and VOR/DME procedures.ģ) There doesn't have to be a front course. As a localizer, it has a narrower signal for the departure, and is aimed at a mountain pass leading to LINDZ intersection.Ģ) No, I PKN is a back course. It's just used for the departure, rather than for an approach. It's a localizer back course, pure and simple. There's no front course.ġ) It's not misnamed. I suggest you ignore the charts for Aspen!Įdited to add (after a glass of Shiraz ) that if SN3 can produce a 300 inbound localiser procedure chart on the I-PKN I will accept is as a back-course. Please note I have no idea what 'NAV' does in the ATR EHSI.!
On the 737 standby horizon (which has localiser left/right only) you also need to select 'Back Course' to see the correct display. The EHSI then shows your position in relation to the localiser correctly. To do this you select the EHSI to 180 inbound localiser course. Why not look at the chart for LFLB (Chambery) in the French Alps? Take Jeppesen plate 10-3 and you will see that you need to fly the ILS R18 northwards on departure. Let's just stick to your original question. Looking at your post to d105 - you got my question bit - after tracking outbound VOR radial we swich to ILS freq after that the question is - We go for Back course or arm Nav mode to intercept Loc outbound for this chart ? "ġ) Whyare you trying to "intercept Loc outbound" when you have turned inbound? Hiren - I think you have got yourself more than a little confused here. This is simply a 'fudged' localiser for tracking purposes, not a 'back course'. Hmm! SN3 - I think you may well have blown poor Hiren's brains there! Not the ideal chart to try to 'help with'?ġ) There is no 'back course ILS that I can see - in my book the labelling of the outbound loc is mis-named.Ģ) I assume the localiser on the I-PKN has reversed lobes?ģ) If it was a 'back-course' localiser, there has to be a 300 inbound course localiser - there is not.
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