ILS frequencies between ... and ...
between 108 and 112 MHz only on odd 100 KHZ and odd 100 KHz plus 50 KHz
Glidepath uses 40 spot UHF between
329.3 MHz to 335 MHz
All marker beacons operate on ...MHz
One dot of localiser deviation =
one dot of glideslope deviation =
One dot of glidepath deviation on a 2-dot EFIS display =
Localiser consists of two overlapping beams, left one amplitude modulated at ... Hz and the right one at ... Hz (left and right relative to direction of approach)
left = 90
right = 150
Localiser aerial is usually in line with the runway centre line and what distance off the upwind end?
Localiser signals protected to a range of ... and ... height, beyond which the signal may be received but not relied upon
Coverage extends to ... degrees either side of the centre line out to ... range but increases to ... degrees either side when within ... range
Reverse sense indications may occur outside of the coverage area
Where terrain gets in the way, coverage distances can be reduced to ... with the 10 degree coverage and ... elsewhere
Sometimes the localiser aerial cannot be sited on the runway centreline upwind and must be placed next to the runway. The beam is then adjusted to cross the centreline at the decision height and the localiser is said to be offset.
If the offset is greater than ... degrees the installation no longer qualifies as a ..., in which case all approaches must be flown down to MDA/MDH and not decision height
Glidepath beams amplitude modulated at ... and ... above and below respectively
Coverage of glidepath extends to ...NM and ... degrees either side of the centre line
Glidepath beams do not go all the way down to the surface
Bottom of the lower lobe is at ... x GP angle
Top of upper lobe is at ... x GP angle
A Glidepath steeper than ... degrees is known as a steep approach and limits of coverage remain the same but now only extend to ... NM
Outer marker coloured ... with a ...hz pitch and an audio tone of ... in morse at a rate of ... per second
2 dashes per second
Middle marker coloured ... with a pitch of ...Hz and ... in morse at a rate of ... per second
dots and dashes
2 dashes and 6 dots per second
inner marker coloured ... with a pitch of ...hz and ... in morse at a rate of ... per second
6 dots per second
Localiser captured before Glidepath, usually between ... and ... ft
Cat I minimum descent height is ... on the baro altimeter and minimum RVR is ...
Cat II minimum descent height is ... on the rad alt and minimum RVR is ...
Cat IIIA minimum descent height is ... on the rad alt and minimum RVR is ...
Cat IIIB minimum descent height is ... on the rad alt and minimum RVR is ...
Cat IIIC minimum descent height is ... on the rad alt and minimum RVR is ...
What are CAT II & III holding points for and what do they look like?
used to hold aircraft on taxiways outside of the ILS sensitive area
looks like a yellow ladder
rate of descent formula for 3 degree glideslope and any other glideslope angle?
5 x groundspeed
5 x groundspeed x (GPA/3)
CAT I systems cut out ... seconds after ground equipment monitoring detects a fault
CAT II and III systems cut out ... seconds after a fault