ILS

Question 1

GLIDEPATH

Answer 1

Beyond the rtunway treshold lateral displaced to the side of the runway centrilne

Question 2

Marker beacon

Answer 2

Blue&raquo_space;low tone»2 dashes per sec
Amber»medium»alternate dashes/dots
White»high&raquo_space;6 dots per sec

All maker beacon operate on a 75 Mhz carrier frequncy

Question 3

Localiser

Answer 3

VHF frequency

Ils odds number

Range 108.00 111.975 mhz

90hz (left). Amplitutde modulated
150hz (right)

Question 4

Glidepath

Answer 4

Works on UFH frequncy

UHF is paired with localizer

Question 5

Radiation of sidelobes gives rise to false glide paths at multiple of the intended path

Question 6

Identtifaction and monitoring

Answer 6

Identify by morse code or viusally on modern a/c

Coarse line is the line between the 150mhz and 90 mhz

Warning if:
~receive d strength is below a threshold value
~absence of carrier frequncy
~absence of modulation simultaneosly
~percenatage modulation of nav signal reduced to 0

Question 7

Hsi/cdi fro ILS

Answer 7

Loc 2.7&raquo_space; fulll scale deflection
Glipeslope 0.7

Back course approaches reverse sense

Answer 8

Localizer 25nm&raquo_space;10 degreees either side

17 nm 35degrees either side

Glideslope 10nm and 8 degrees either side

Answer 9

CAT 1 (DA ,ALTITUDE BAROMETRIC)»>200ft DA»RVR 550m

CAT 2 (RADIO ALTIMENTER )»>100FT»RVR 300m

CAT 3 (0 FT DECISION HEIGHT)»>0FT DA»>RVR 200m
Guidance to and along the runway (rollout guidance)

A

B»>RVR 75m

C&raquo_space;>RVR 0m

Bellow 1000ft RVR are advisary ,whihcm eans you can carry on wihtout going around if the rvr drops in approach

Question 10

Defelction

Answer 10

Must fly within 1/2 scale defelction to be considered established

Exceeding 1/2 scale deflection ,mandatory go around

Question 11

Errors

Answer 11

Multi path propagation

Beam bend: deviation from nomial loc and gp which can be assessed by flight test.the result of multi path propagation caused by objects in the ILS area.

Question 12

ILS CRITICAL AREA

Answer 12

USED DAY TO DAY ,CAT 1

AN AREA DIMENSION AROUND THE LOC AND GP ANTENNA WHERE VEHICLES

Question 13

ILS SENSITIVE AREA

Answer 13

USED DURING LVPs ,CAT 2 OR CAT 3

An area extending beoynd the ILS cruitical area,where parking or movimnet of vehicles,inclusing a/c .is controlled to prevent the possbiity of unacceptabe intefence to the ils during ils operation