ILS Flashcards

1
Q

GLIDEPATH

A

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

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2
Q

Marker beacon

A

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

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3
Q

Localiser

A

VHF frequency

Ils odds number

Range 108.00 111.975 mhz

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

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4
Q

Glidepath

A

Works on UFH frequncy

UHF is paired with localizer

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5
Q

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

A
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6
Q

Identtifaction and monitoring

A

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

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7
Q

Hsi/cdi fro ILS

A

Loc 2.7&raquo_space; fulll scale deflection
Glipeslope 0.7

Back course approaches reverse sense

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8
Q
A

Localizer 25nm&raquo_space;10 degreees either side

17 nm 35degrees either side

Glideslope 10nm and 8 degrees either side

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9
Q
A

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

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10
Q

Defelction

A

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

Exceeding 1/2 scale deflection ,mandatory go around

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11
Q

Errors

A

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.

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12
Q

ILS CRITICAL AREA

A

USED DAY TO DAY ,CAT 1

AN AREA DIMENSION AROUND THE LOC AND GP ANTENNA WHERE VEHICLES

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13
Q

ILS SENSITIVE AREA

A

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

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