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Old 22nd Aug 2009, 01:07
  #817 (permalink)  
Fratemate
 
Join Date: Nov 2008
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At 200' one dot off the slope and one dot off the glide, how far off in feet are you? I can't remember the formula.
The answer is 33.5m or about 110'. With a 60m wide runway, not the best position to be in and, therefore, the answer they're looking for is that you'd go-around, as safety is paramount.

Using a 3000m runway, the localiser is normally 3.6 degs wide (such that the beam width is 700' wide at the threshold of the runway). Therefore, on the expanded scale, one dot = 0.45 degs. Total distance from LOC antenna to your aircraft at 200' = 4267m. So, Tan45 X 4267 = 33.5m......or 110' for philistines

You ask your PNF to set the CDU for you, either for the VOR app or the ILS app. You can, if you wish, extend the centreline as you approach the inbound radial/localiser or you can just leave the picture as it is (I would suggest the latter and concentrate on the approach. The fancy stuff can come later during training). For the VOR, you go to manual about 5 miles before crossing the VOR outbound on the procedure (you can check station passage and confirm distance from the VOR, even though you're going out for 3 minutes). For the ILS, have the PNF go to expanded ILS on the base leg. That way you'll see the LOC activity a bit sooner and, more importantly, get the ILS DME on your display. You're acting as PF, so you always ask the other guy to do something, don't expect him to do it automatically.
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