ILS

Question 1

Where is localiser installed?

Answer 1

300m / 1000ft away from opposite threshold of runway (upwind)

Question 2

Where is glideslope located?

Answer 2

300m / 1000ft away from the downwind threshold and 200m away

Question 3

Where are the 90Hz and 150Hz freq located

Answer 3

90Hz - up and left

150Hz - down and right

Question 4

Localiser frequency

Answer 4

108 - 111.95 MHz (Odd)

Question 5

Glidepath freq

Answer 5

329.15 - 335 MHz

Question 6

Marker beacon freq

Answer 6

All transmit at 75Mhz

Question 7

Localiser coverage

Answer 7

10 degrees till 25NM
35 degrees till 17 NM

Question 8

Glidepath vertical coverage formula

Answer 8

Lower = 0.45 x theta

upper = 1.75 x theta

Question 9

ILS CDI full scale deflection?

Answer 9

Localiser - 2.5 degrees - 0.5 per dot

Glidepath - 0.7 degrees - 0.14 per dot

Question 10

Errors of ILS

Answer 10

Wave Bending, Scalloping, Beam noise, weather effects

Question 11

Where are all the false glide slopes?

Answer 11

Above first true glidepath

Question 12

Audio freq and visual of middle marker

Answer 12

1300 Hz Alternating dots and dashes

Amber light

0.6NM

Question 13

Outer marker freq

Answer 13

400 Hz Blue 4NM