Chapter 12, Instrument Landing System

Question 1

Frequency bands for ILS are

Answer 1

Localizer (VHF) and glide slope (UHF)

Question 2

Localizer transmitters are located

Answer 2

At the stop end of the runway, on the
centreline

Question 3

The LRRA provides

Answer 3

Altitude in feet above the ground

Question 4

Some airfields use NDBs in conjunction with
(or in place of) the

Answer 4

Outer marker

Question 5

When viewed from the antenna, the localizer
is characterised by two lobes modulated

Answer 5

90 Hz to the right, 150 Hz to the left of the
centreline

Question 6

ILS frequencies are selected by tuning

Answer 6

The localizer which automatically selects
the glide slope

Question 7

The ILS glide slope is inclined at a fixed angle
between

Answer 7

2.5 and 3.5 degrees

Question 8

The glide slope is characterised by two lobes
modulated

Answer 8

90 Hz above, 150 Hz below the glide
slope angle

Question 9

Marker beacons transmit on which
frequency?

Answer 9

75 MHz

Question 10

With three marker beacons installed in an
ILS system, they will be encountered along
the approach as

Answer 10

Outer, middle, inner

Question 11

Marker beacon outputs are given by

Answer 11

Coloured lights and Morse code tones

Question 12

The decision height and runway visual
range for a Category 2 automatic approach
are

Answer 12

100 ft. and 300 m respectively

Question 13

The outer marker is displayed on the primary
flying display as a coloured icon that is

Answer 13

Cyan

Question 14

When the aircraft has touched down with an
automatic landing, the ILS continues to
provide

Answer 14

Lateral control via the localizer