IFR ILS quiz, Mark Boyd, 8/27/02

1.  Given "hold at the locator on the SNS ILS" you only have DME (no
ADF) and you've just crossed SNS VORTAC at 4000.  What do you do?

2.  What is a protected area?  Why might an ILS approach to minimums be
unsafe at an uncontrolled or tower-closed airport?

3.  You hear a plane starting the approach into SNS on the ILS to
minimums.  You are holding S at SNS at 4000.  Why is this wrong?

4.  Draw the ILS transmitters and their degrees and dimensions with
respect to the threshold.  Assume 3 degree glideslope and standard ILS
minimums (200 and 1/2).  How wide (in feet) is full scale to full 
scale deflection of the localizer at the ILS MAP?.  How tall (in feet) 
is the glideslope full scale to full scale deflection at the MAP?  At 
the MAP, how far are you from the threshold?  What is your threshold 
crossing height?   If you have exactly 1/4 scale deflection of the G/S 
and localizer at the MAP, how far from DH and centerline is the airplane? 
Bonus:  if you are on the CAT III ILS with 1/4 deflection on the
needles, how far from TCH and centerline are you?

answers:  http://www.soe.ucsc.edu/~mjboyd/cfi/IFRilsquizanswers