Chapter 3: Non Directional Beacon

Question 1

Ground Station

Frequency Range

Answer 1

190 - 1975 kHz

Question 2

NDB Type 1

Signal type, ident, required equipment

Answer 2

A1A NON
pulse
Interruption during ident
need BFO (beat frequency oscillator)

Question 3

NDB Type 2

Signal type, ident, power requirement? How does power change with range

Answer 3

A2A NON
AM signal
2 letters = locator: low power, 25 nmi
3 letters = NDB: high power, 50 nmi
2x range = 4x power

Question 4

ADF

Need (3), what about antennas

Answer 4

Automatic Direction Finder
antennas, receiver, indicator
Loop: direction w/ 180° ambiguity
Sense: 1 null position