ADF

Question 1

What frequency does ADF operate

Answer 1

Low to mid frequency - 190KHz to 1750KHz

Question 2

What type of signal does an NDB emit

Answer 2

Omni-Directional, vertically polarized signal

Question 3

What type of wave is used for ADF navigation

Answer 3

Ground wave

Question 4

What type of aerial does ADF use

Answer 4

A loop and sense aerial

Question 5

1-What is quadrantal error
2-what headings does it act on

Answer 5

1-Errors caused by the re-radiation of radio waves for metal parts of a/c
2-Acts 45° from cardinal points

Question 6

When are coastal refraction errors greatest

Answer 6

When ADF station is inland and bearing is at an acute angle to coast

Question 7

What causes the greatest inaccuracy in ADFs

Answer 7

Thunderstorm activity

Question 8

What type of emission is:
1-low power NDB
2-long range NDB

Answer 8

1-A2A
2-A1A

Question 9

Does snow have an effect on NDBs range and accuracy

Answer 9

No

Question 10

What errors do NDBs face

Answer 10

Night effect
Station interference
Lack of a failure warning system
Quadrantal error

Question 11

What type of signal does an ADF ground station emit

Answer 11

An omni-directional signal

Question 12

What happens to the range and accuracy of an NDB at night

Answer 12

Accuracy decreases
Range increases

Question 13

1-What are locators
2-what range do they transmit

Answer 13

1-Low powered NBDs used for airfield or runway approaches
2-10nm - 25nm