Welcome Guest. Sign in or Signup

On the Private Pilot Written Test


Question #3561 states

(REFER TO FIGURE 25 and Figure 29 in the Private Pilot Supplement) 

The VOR is tuned to the Bonham VORTAC (area 3) and the aircraft is positioned over the town of Sulpher Springs (Area 5).  Which VOR indication is correct? 

A.  7

B.  1

C.  8   


I have marked that the answer is A VOR #7  but this VOR does not have a TO/FROM symbol in any supplements that I have seen.  TO me that would make it seem like it is not receiving a signal from the VOR Facility 

Or is it because since the town and the VOR to Sulpher Springs are close enough that it is in the process of switching on the TO/FROM indicator?  

Why is it VOR #7?  


Ace Any FAA Written Test!
Dauntless Aviation's GroundSchool series of apps are the smart pilot's choice for fast and effective FAA knowledge test prep.
Actual, up-to-date FAA questions Polished user experience
Best explanations in the business Free lifetime updates!
Private Pilot IFR Commercial Pilot CFI ATP Sport Pilot Sport Pilot Instructor Parachute Rigger Aviation Mechanic (A&P)
You can get the app now and be studying right away. Available for PC, Mac, iPhone/iPad, and Android.

3 Answers

  1. John D. Collins on Mar 09, 2011

    It is VOR #7 for the reason you stated.  7 and 8 have the OBS radial of 210 selected and 1 has the reciprocal radial of 030 selected.  Based on the position over the town of Sulphur Springs, the CDI will be deflected to full scale in all cases for the 030 or 210 degree radial, and should have a full fly left if the OBS is set to 030 degrees and a full fly right if the OBS is set to 210 degrees.  This eliminates choice 8 as it shows the CDI centered. The To-From flag determines which side of the VOR you are in.  The position of the aircraft is approximately on the 120 degree radial of the VOR, or 90 degrees off either of the two radial choices.  This is the area where the To – From flag is changing from To to From or visa versa and is therefore ambiguous and will be hidden.  7 is correct because it does not show the flag to be either To or From.  1 shows the aircraft to be on the To side of the 030 radial which would put the aircraft south of the 120 radial, which it isn’t.
    The To/From Flag is a different indicator from the Nav flag. The latter is used to indicate that a valid signal is not being received adequatley.  In the figure, there is no Nav flag shown, so you can’t draw any conclusion regarding reception.

    +1 Votes Thumb up 3 Votes Thumb down 2 Votes

  2. carpediem1 on Feb 06, 2012

    if You would like an easy explenation download the free trial of our software at
    and view the slide named Test Questions 4 where we cover this question specifically.

    +4 Votes Thumb up 4 Votes Thumb down 0 Votes

  3. carpediem1 on Feb 07, 2012

    I have also posted a video on youtube. Here is the link

    +4 Votes Thumb up 4 Votes Thumb down 0 Votes

The following terms have been auto-detected the question above and any answers or discussion provided. Click on a term to see its definition from the Dauntless Aviation JargonBuster Glossary.

Answer Question

Our sincere thanks to all who contribute constructively to this forum in answering flight training questions. If you are a flight instructor or represent a flight school / FBO offering flight instruction, you are welcome to include links to your site and related contact information as it pertains to offering local flight instruction in a specific geographic area. Additionally, direct links to FAA and related official government sources of information are welcome. However we thank you for your understanding that links to other sites or text that may be construed as explicit or implicit advertising of other business, sites, or goods/services are not permitted even if such links nominally are relevant to the question asked.