VOR Flashcards
Pictured are several aircraft all with their OBS set to 360°. Which aircaft (A,B,C,D,E,F,G,H) would show the FROM flag on the instrument?
Select all aircraft that would show the FROM flag
A, B, C, D
List at least two indications that could be used to indicate you are passing overhead a VOR station
**CDI needle becomes increasingly sensitive as you approach
Flicker of the TO/FROM flag and a change from the TO flag to the FROM flag (and vice versa)
OFF flag briefly shown as passing directly overhead the ‘cone of silence/confusion’ of the VOR**
Each dot on the CDI instrument indicates ____° deviation
2°
The radial that the aircraft is on is always indicated by the (tail, head) of the needle when shown on the RMI
What is the correct answer?
tail
OBS stands for ____ ____ ____
Omni Bearing Selector
The OBS is set to 120° and the TO flag is shown, but you soon find yourself off course by 65° and tracking 185°. You would expect the TO/FROM flag to now show (TO, FROM, OFF)
What is the correct answer?
TO
The VOR operates in the ____ band
VHF
The VOR Variable Phase Signal is (directional, omni-directional)
directional
The CDI needle is deflected left from centre, this means the selected radial is to your (left, right) and you need to turn (left, right) to regain track
What is the correct answer?
The CDI needle is deflected left from centre, this means the selected radial is to your left and you need to turn left to regain track
Max range of VOR is deemed ____ of ____
line of sight
The TO/FROM Flag (does, does not) change with aircraft heading
does not
The TO/FROM Flag (does, does not) indicate if the aircraft is flying to or from the VOR station
What is the correct answer?
**does not
(as it ignores aircraft heading)**
The CDI devaition scale indicates a maximum (full dot deflection) of ____° either side of the selected radial
10°
The main factor effecting VOR range is…
Mountainous terrian
You are tracking inbound on the VOR 030° radial. What OBS setting should you set to provide command indications, and what would be the correct TO/FROM indication?
210° set on the OBS, TO flag showing
Which of the following should be considered as station passage when using VOR?
The first complete reversal of the TO FROM indicator
the maximum permissible bearing error for an airborne checkpoint is plus or minus _____ degrees.
6
The VOR check must be entered into:
The aircraft log or other record.
How to check the VOR sensitvity?
1) noting the number of degrees of change as you rotate the OBS to move the CDI from center to the last dot on either side. The selected course should not exceed 10° or 12° either side.
A particular VOR station is undergoing routine maintenance. This is evidenced by
removal of the identification feature.
) A VOR receiver with normal five-dot course sensitivity shows a three-dot deflection at 30 NM from the station. The aircraft would be displaced approximately how far from the course centerline?
Each dot represents about 200’ per mile. 30 x 200 = 6,000’ or about one mile. A 3 dot deflection of the CDI indicates the aircraft is off course about 3 miles.
For operations off established airways at 17,000 feet MSL in the contiguous U.S., (H) Class VORTAC facilities used to define a direct route of flight should be no farther apart than
The standard high altitude service volume between 14,500’ and 18,000’ is 100 NM. Therefore, between two “H” VORTACs the useful range is 200 NM.
What angular deviation from a VOR course centerline is represented by a 1/2 scale deflection of the CDI?
Full needle deflection of the CDI from the center position to either side of the dial indicates the aircraft is 10° or more off course. A 1/2 scale deflection of the CDI represents 5°.
Full scale deflection of a CDI occurs when the course deviation bar or needle
deflects from the center of the scale to either far side of the scale.
What is the lateral displacement of the aircraft in NM from the radial selected on the No. 1 NAV? 2.5 dots
2.5 X 200 = 500’
500’X 60=30000
30000= 5miles (1NM is 6000’)
An aircraft which is located 30 miles from a VOR station and shows a 1/2 scale deflection on the CDI would be how far from the selected course centerline?
There are 5 dots on either side of the center of the CDI. Each dot represents about 200’ per mile. 30 x 200 = 6,000’ or about one mile. A 2.5 dot deflection of the CDI indicates the aircraft is off course about 2.5 miles.
