ILS Flashcards
What does ILS consist of
Localiser
Glideslope
Range
What is cat 1
200’
What is cat 2
100’
What is cat 3 A
50’
What is cat 3 B
0’
What is cat 3 c
0’ / 0m
What is the principle of ILS
Difference in depth of modulation
What is the frequency range of ILS
108.10 - 111.95
Only odd number in first decimal
Where is ILS glideslope usually located
120m to the side
300m down the runway
What is the frequency of ILS glide slope
328.6 - 335.4 MHz (UHF)
Number not on chart
What are the false glideslope lobes ILS
Above glide slope only
In multiples of main glideslope
What is the full scale deflection of glideslope ILS
0.7°
What is full scale deflection of localiser ILS
2.5°
What scale deflection does a ILS need to be
Half scale deflection
What frequency is a marker beacon
75mhz
What is the outer marker beacon
Blue
400hz
5 nm
What is middle marker beacon
Amber
- . -.-.-.-.-.-.
1300hz
0.5 - 1nm
What is the inner (airway) marker beacon
White
3000hz
……..
0.2nm
What can be in the critical area ILS
No vehicles
What can be in the sensitive area ils
A limited amount of vehicles
What are the components of microwave landing system (MLS)
Azimuth = horizontal \+ Elevation \+ DME position
What frequency is a microwave landing system
5031 - 5091 MHz (SHF)
What is the Benefit is there for a microwave landing system
Can create whatever type of approach you want as long as it is within the cone
