Navigation AIDS (VOR, NDB, DME) Flashcards

1
Q

How does a VOR Work?

A

-2 phases: reference and variable phase
-Reference phase: Frequency is sent out (omnidirectional radio waves)
-Variable phase: Sweeping frequency

-Compares the two to get location

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2
Q

VOR Errors

A

-Line of Sight (needs to be able to see aircraft)
-Cone of confusion (when flying over VOR)
-Service Volumes (Terminal, Low, High) (Legacy and New)

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3
Q

DME

A

-Plane sends an integration signal
-DME sends a reply signal

-Measures location off of rate and time of signal

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4
Q

DME Errors

A

-Slant range (needs to get altitude, not just horizontal)
-Line of sight (need to be able to be seen)
-199nm, 200 aircraft limit

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5
Q

NDB/ADF

A

-NBD is the ground station and ADF is located on the plane
-signal are sent from the NBD
-Loop antenna picks out the freq that could be the NDB
-Sensing antenna picks the strongest
-ADF points where NDB are

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6
Q

NDB Errors

A

-Thunderstorm effect (thunderstorms can cause faulty readings)
-Mountian effect
-Line of sight

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