( INSTRUMENT LANDING SYSTEM)
GENERAL Localizer frequency.
4:it provides course guidance throughout
Descent path to runway threshold from
Distance of 18 NM antenna between
Altitude of 1000 FTabove the highest
Terrain alongthe course line and 4500FT
Elevation of antenna site
A:10 DEGREES ethier side ofcourse along
Radius 18 NM from antenna
B:from10to 35 degrees either side of course
Along radius of 10 NM
1:I L S is designed to provide path for exact
Alignment and descent of an aircraft on final
Approach to a runway.
2:the ground equipment consists of two highly
Directional transmitting system and along
the approach 3 or fewer marker beacons .
3:the system may be divided functionally
Into three parts:
A:guidance information:localizer/glideslope.
B:range information:marker beacon/D M E.
C:visual information:runway lights/applight.
4:where acomplete I L S is installed on each
End of arunway are not in service on the
Same time .
LOCALIZER
1:localizer transmitter operates on one of 40
I L S channels withinfrequancy range of
108.1 to 111.95MHZ signal provide the pilot
With course guidance to runway center line.
2:it transmit at the far end of runway and
Adjusted for acourse width 700 feet at
Runway threshold.
3:identification is in international morse
Code of athree letter transmitted on
