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1st sem (2nd YR) > NAOPM (Mod 2) > Flashcards

NAOPM (Mod 2) Flashcards

1
Q
  • Short radio navigation system
  • Calculates the relative bearing
A

Automatic direction finder

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2
Q

What frequency does ADF operate on

A

190 kHz - 1750 kHz (medium frequency)

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3
Q

____ is the aircraft equipment
____ is the ground station

A
  • Automatic direction finder
  • Non directional beacon
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3
Q
  • Equally sensitive to all signals/radius
  • No pattern
  • Equally distributed
A

Non directional beacon

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4
Q

ADF system components

A

ADF antenna (loop & sense) -> ADF receiver -> ADF control panel -> Display/Instrument

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5
Q

Difference between ADF and VOR

A

ADF has more range

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6
Q

VOR operates in what frequency

A

Very high frequency

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7
Q

Types of propagation and its operating frequency

A
  • Ground (VLF, LF, MF)
  • Sky (HF)
  • Space (VHF)
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8
Q

2 types of ADF antenna

A
  • Loop
  • Sense
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9
Q

Where is loop antenna located

A

Bottom of aircraft

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10
Q

Where is sense antenna located

A

Top of aircraft

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10
Q

ADF instruments

A
  • Relative bearing indicator
  • Relative bearing indicator (moving card)
  • Radio magnetic indicator
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10
Q

ADF operational modes

A
  • ADF mode
  • Antenna mode
  • Beat frequency oscillator
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10
Q

ADF mode

A
  • Fully operational
  • Loop and sense antenna
  • Relative bearing
  • Morse identifier is heard
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11
Q

Antenna mode

A
  • Sense antenna
  • Morse identifier
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12
Q

Beat frequency oscillator

A

If the NDB transmits w/out a tone the system will produce a tone so there will be an identifier

13
Q

Non directional beacon operates in what frequency

A

LF/MF (190-595 kHz)

14
Q
  • Little used of enroute navigation in the US but still used for approaches
  • Used for enroute nav. In much of the world
A

Non directional beacon

15
Q

NDBs are also useful at ranges up to

A

600 N.M.

16
Q

Transmitter vary in power from ___ watts for ____ on an ILS approach to as much as ____ watts

A
  • 25
  • Locator outer markers
  • 2000
16
Q

The range of the most powerful transmitters is listed as ___ miles but is usually much greater

A

75

16
Q

4 types of non directional beacon

A
  • Compass locator
  • Approach aids
  • Enroute beacon
  • High power beacon
17
Q

The Automatic Direction Finder (ADF) consists of :

A
  • AM receiver
  • Sense antenna
  • Loop antenna
  • Indicator
17
Q

There is a switch on the receiver marked:

A
  • OFF
  • ADF
  • ANT
  • BFO
18
Q

This switch position gives maximum receiver sensitivity and should be used for tuning and identifying (3letters coded I.D except for LOMs which have 2 letter I.D)

A

ANT

19
Q

This switch position is used for better identifying unmodulated signals which are used in other parts of the world.

A

BFO

1st sem (2nd YR) (24 decks)

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