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Radio Navigation > Instrument Landing System > Flashcards

Instrument Landing System Flashcards

1
Q

What is the principle of operation for an ILS?

A

Depth of modulation.

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2
Q

What is the frequency band of a localiser?

A

108.00 to 111.95 MHz (VHF)

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3
Q

What causes fading?

A

Night effect

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4
Q

What frequency band name does the glide slope use?

A

UHF

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5
Q

What is the frequency band for the glide slope?

A

328.6 to 335.4

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6
Q

Which lobe on the ILS is to the right?

A

150Hz

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7
Q

What lobe on the ILS is to the left?

A

90 Hz

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8
Q

What are the dimensions of the localiser?

A

25nm and 10 degrees

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9
Q

What are the dimensions of the glide slope?

A

10nm and 8 degrees

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10
Q

What is the transmitting frequency of a marker beacon?

A

75MHz

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11
Q

What colour light is the outer marker?

A

Blue

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12
Q

What frequency and pitch is the outer marker?

A

400 Hz low

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13
Q

What colour appears when over the middle marker beacon?

A

Amber

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14
Q

What colour appears when over the inner marker beacon?

A

White

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15
Q

What sound can be heard when over the middle marker beacon?

A

Dots and dashes

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16
Q

What sound can be heard when over the outer marker beacon?

A

Dashes

17
Q

What sound can be heard when over the inner marker beacon?

A

Dots

18
Q

What is the maximum deflection on a localiser?

A

2.5 degrees

19
Q

What is full deflection on the glide slope?

A

0.7 degrees

20
Q

What is the minimum decision height for a CAT I ILS?

A

200ft

21
Q

What is the decision height for a CAT III A ILS?

A

Lower than 100ft

22
Q

What is the decision height for a CAT III B ILS?

A

Lower than 50ft

23
Q

What is the required runway visual range for a CAT I ILS?

A

550m

24
Q

What is the required runway visual range for a CAT II ILS?

A

300m

25
Q

What is the required runway visual range for a CAT III A ILS?

A

200m

26
Q

What is the required runway visual range for a CAT III B ILS?

A

Greater than 75m but less than 200m

Radio Navigation (12 decks)

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