34
Advanced Operation
Note
:
You may change the COM band receive frequency while
receiving an ILS signal. If the [
ENT
] key is pressed
while the tag name of the airport is selected, the recall
screen listing the frequencies you have used will tempo-
rarily appear on the display, so that you may select a fre-
quency from the list with the [
◄
] or [
►
] key or change
the frequency with the
DIAL
selector knob.
Terminology
:
The localizer signal guides the approach to the run-
way in horizontal direction.
The glide slope signal guides the approach to the
runway in vertical direction. Note that some airports
are unequipped with the glide slope.
Runway
Course of approach
Guided by
glide slope
Glide slope
Localizer
Guided by
localizer
Reading the CDI
The course deviation needle moves to the right if
your aircraft is off course to the left of the runway, or
moves to the left if your aircraft is off course to the
right of the runway.
The height deviation indicator moves up if your
aircraft flies lower than the ideal altitude, or moves
down if your aircraft flies higher than the ideal alti
-
tude.
Right
(LOC)
Left
(LOC)
High
(GS)
On course
Low
(GS)
CDI Examples Corresponding to Aircraft Location
(Runway is to be at the back of the screen)