Su 3 Navigation System Flashcards
As a rule of thumb, to minimize DME slant range error, how far from the facility should you be to consider the reading as accurate
One or more miles for each 1,000 feet of altitude above the facility
Which distance is displayed by the DME indicator?
slant range distance in NM
Which DME indication should you receive when you are directly over a VORTAC site at approximately 6,000 feet AGL?
1
The greatest DME indication error between actual ground distance and displayed ground distance occurs at
high altitudes close to the VORTAC
To find the VOR receiver ground checkpoint(s) for an accuracy check, which publication should you consult?
Chart supplement
When flying directly over a published airborne VOR checkpoint, what is the maximum error allowed for IFR flight?
Plus or minus 6 degrees of designated radial
When using VOT to make a VOR receiver check, the CDI should be centered and the OBS should indicate that the aircraft is on the
360 radial
When making an airborne VOR check, what is the maximum allowable tolerance between the two indicators of a dual VOR system (units independent of each other except the antenna)?
4 degrees between the two indicated radials of VOR
When the CDI needle is centered during an airborne VOT check, the omni-bearing selector and TO/FROM indicator should read
within 6 degrees of the selected radial
(Refer to figure 81 below.) When checking a dual VOR system by use of a VOT, which illustration indicates the VOR’s are satisfactory?
1
(Refer to Figure 82 below.) Which is an acceptable range of accuracy when performing an operational check of dual VOR’s using one system against the other?
4
While airborne, what is the maximum permissible variable between the two indicated bearings when checking one VOR system against the other?
4 degrees between the two indicated bearings to a VOR
How should the pilot make a VOR receiver check when the aircraft is located on the designated checkpoint on the airport surface?
Set the OBS on the designated radial. The CDI must center within plus or minus 4 degrees of that radial with a FROM indication
Where can the VOT frequency for a particular airport be found?
Only in the Chart Supplement
Which indications are acceptable tolerances when checking both VOR receivers by use of the VOT?
176 degrees TO and 003 degrees FROM, respectively
What indication should a pilot receive when a VOR station is undergoing maintenance and may be considered unreliable?
No coded identification, but possible navigation indications
A particular VOR station is undergoing routine maintenance. This is evidence by
removal of the identification feature
When a VOR/DME is collocated under frequency pairings and the VOR portion is inoperative, the DME identifier will repeat t an interval of
30 second intervals at 1350hz
What is the meaning of a single coded identification received only once approximately every 30 seconds from a VORTAC?
The DME component is operative and the VOR component is inoperative
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
200 NM
You are planning an IFR flight off established airways below 18,000 feet MSL. If you use VOR navigation to define the route, the maximum distance between NAVAIDs should be
80 NM
What angular deviation from a VOR course centerline is represented by a full-scale deflection of the CDI?
10 degrees
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
When using VOR for navigation, which of the following should be considered as station passage?
The first positive, complete reversal of the TO-FROM indicator
Which of the following should be considered as station passage when using VOR?
The first complete reversal of the TO-FROM indicator
When checking the sensitivity of a VOR receiver, the number of degrees in course change as the OBS is rotated to move the CDI from center to the last dot on either side should be between
10 degrees and 12 degrees
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?
3 NM
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?
2 1/2 miles
What angular deviation from a VOR course centerline is represented by a 1/2 scale deflection of CDI?
5 degrees
Determine the approximate time and distance to a station if a 5 degrees wingtip bearing change occurs in 1.5 minutes with a true airspeed of 95 knots
18 minutes and 28.5 NM
(Refer to Figure 106 below.) The course selector of each aircraft is set on 360 degrees. Which aircraft would have a FROM indication on the TO/FROM indicator and the CDI pointing right of center?
1