VOR

Question 1

What does VOR mean?

Answer 1

Very High Frequency Omnidirectional Range (VOR)

Question 2

What is VOR used for?

Answer 2

1) Point to point navigation

2) Instrument Approach Procedures (IAP)

Question 3

What is the frequency range for VOR?

Answer 3

108.00 to 117.95 MHz

Question 4

What is used as the primary means to tune nav aids in The PC-21?

Answer 4

The UFCP

Question 5

What is VOR often paired with?

Answer 5

DME

Question 6

How does a VOR operate?

Answer 6

Transmits two VHF radio signals:

1) A constant reference phase signal, which is omnidirectional
2) A variable phase signal, which rotates uniformly at a rate of 1,800 rpm

Question 7

What does the VOR airborne receiver do?

Answer 7

Picks up the two signals sent from the beacon, and measures the phase different which is then translated to a bearing and spits out the bearing that the A/C is on.

Question 8

What is the most important feature of the VOR?

Answer 8

That it transmits different signals in different directions, which allows the receiver to identify which radial it is on.

Question 9

Where is radial information always taken from on the cockpit indicator?

Answer 9

Radial is always taken from the tail of the needle.

Question 10

Are VOR signals line of sight? What is used to try and reduce the errors associated with existing terrain or local obstacle?

Answer 10

• Normally Yes

- Doppler VORs can be used.

Question 11

What A/C equipment is used for VOR?

Answer 11

1) VOR Antenna
2) Receiver
3) Control Panel

Question 12

What are the rated coverages for VORs (should be memorized)?

Answer 12

Below 5,000 ft = 60 NM
5,000 to below 10,000 = 90 NM
10,000 to below 15,000 = 120 NM
15,000 to below 20,000 = 150 NM
20,000 and above = 180 NM

Question 13

What are the errors associated with VOR?

Answer 13

A = Airborne Equipment Error
V = Vertical Polarisation error (very rare)
G = Ground Station Error
A = Aggregate error
S = Site Effect Error (caused from features near the VOR station)