Questions tagged [vor]

VOR (VHF Omnidirectional Range) is a radio navigation technology used by aircraft to determine their position and remain on-course.

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What is the difference between unserviceable, unusable, and not maintained?

Here are some NOTAMS for a recent flight I was planning: ...
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2 votes
1 answer
175 views

I have two VOR receivers, but if one VOR is out of tolerance, can I still fly IFR?

According to 91.171, I am not allowed to fly IFR unless: "...unless the VOR equipment of that aircraft - (1) Is maintained, checked, and inspected under an approved procedure; or (2) Has been ...
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191 views

Scalloping vs Site error in VOR

I am not able to understand the difference between scalloping and site error in VOR because the theoretical defination of both of them is almost same
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3 votes
1 answer
100 views

How do you calculate the deviation from an RNAV waypoint radial?

As a clarification at the beginning: I'm talking about non-GPS, pure VOR-DME based RNAV devices here. On RNAV devices that use just the selected VOR-DME, not GPS, the phantom radio station is set up ...
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7 votes
3 answers
599 views

What would be the likely indication on the VOR for the below question?

The answer given on the textbook is figure 2. But How can the Needle be centered if the aircraft is not on the radial?
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3 votes
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Why do DVORs and CVORs rotate in different directions?

I am currently studying both systems and I have the following doubt: why does DVOR rotate counterclockwise as opossed to CVOR? Could it be because the reference and variable signal are "swapped&...
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7 votes
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Why is the treatment of magnetic variation different for NDB and VOR?

Why in solving numerals of NDB and VOR, do we apply variation at the station in case of VOR and at the aircraft in case of NDB?
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8 votes
1 answer
441 views

What is Automatic Radial Centering on a VOR indicator?

As the title says - some steam VOR indicators got an ARC indicator lamp. According to the POH of an aircraft featuring such a VOR indicator this means Automatic Radial Centering. What is that ? I ...
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9 votes
2 answers
795 views

Are there two navaids on the same frequency close enough to be confused?

Several RTCA DO standards require checks for bad navaid tuning including, "In lieu of using ground-based navigation aid designated operational coverage (DOC), the system should provide, checks ...
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3 votes
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Can I document a VOR check with a photo to comply with 91.171(d)?

I'm interested in understanding the limits of what it means to "sign" a record. While enroute for any meaningful length of time, I try to tune two VOR's and I take a photo of the G1000 NXi ...
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Why does the 0 radial on a sectional's VOR appear not to point to magnetic north? [duplicate]

I have been scanning sectional charts and have noticed that the local magnetic declination is always a few degrees off from the 0 radial of VOR's around it. I have been told that the two are supposed ...
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Why would there be two RNAV waypoints co-located with a VOR?

Similar to this question but more so! The Enroute H-5 chart shows two RNAV waypoints over Spinner VORTAC (SPI): SOHOW and USIRE. Neither waypoint appears on the Low IFR charts, nor on the VFR charts. ...
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How to figure unusable sectors if the VOR is not colocated at/near an airport?

Stemming from Why am I not getting the "TO" VOR flag as I think I should? If a VOR is not colocated at an airport (i.e. not in that airport's chart supplement page), how does one figure out ...
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13 votes
1 answer
1k views

Why am I not getting the "TO" VOR flag as I think I should?

I would appreciate some insight as to what I’m doing wrong or missing. I just completed a XC flight practicing VOR/GPS Navigation. I was inbound to KLOL from KRNO with the lovelock VOR frequency (116....
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8 votes
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Why is the VOR reference and variable signal modulated at 30 Hz?

VOR signals radiated from the ground beacon are modulated at 30 Hertz. What is the reason behind this?
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When I use a plotter to identify a direction from a VOR, what heading or course is it exactly?

When I use my ASA IFR plotter and I'm working off a VOR, what direction am I getting? True course, true heading, magnetic heading, magnetic course?
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1 vote
1 answer
116 views

How does a VOR or a VORDME affect the coding decision between CF or IF-TF respectively?

I was reading of the following case in ARINC 424-17 spec. Unfortunately the image is copyrighted and I can't paste it here, so here is a low(er) quality image of mine replicating the situation: The ...
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2 votes
4 answers
577 views

Selecting radials for radial interception

I’m a beginner in intrument flying so sorry for my ignorance. Few months ago I was doing BIR training and with my CFI we were intercepting radials, we were doing that on HSI (Garmin G500). He told me ...
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Is using a VOR considered IFR or VFR?

As the title mentioned. And also, is using it in zero visibility (or near) a real life scenario?
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2 votes
1 answer
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What are the units for the bearing to center of an airport from radio aids to navigation in chart supplement?

Is the bearing to the center of airport for a radio aid to navigation in the chart supplement, true course, magnetic course, is it based on the VOR's radials, or is it something else?
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9 votes
2 answers
4k views

What radial is the aircraft crossing?

I'm working through the ASA Private Pilot 2020 Test Prep questions and there's a question I don't understand the answer for. 3579 (Refer to Figure 28, illustration 5) The VOR receiver has the ...
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If the VOR works and the TACAN works, why doesn’t the VORTAC work?

Here https://www.tailstrike.com/270680.htm is the transcript of the CVR of the Itavia Flight 870 (Ustica Massacre), but some communications have been omitted; I’ll use this site: http://www....
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What button do I push on the instrument panel to activate DME in VOR navigation? [closed]

For some strange reason I cannot seem to find any information about what button to push on the instrument panel to active the DME. There is plenty of information about how DME works with ...
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2 votes
3 answers
829 views

Is it allowed and possible to hold at the intersection of two VOR radials using a single VOR receiver?

First of all, is it permitted? I am practicing VOR tracking on my simulator and the missed approach procedure (KLGB VOR 30) takes you out to an intersection off two VOR radials. Since the plate doesn'...
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1 vote
1 answer
113 views

What if you approach the VOR station such that your turn OB is not on the holding side?

I'm reviewing the Sporty's ground school for VOR approaches, and their example shows the approach to the VOR station then heading OB as tracking on the holding side. What if you approach the VOR ...
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4 answers
747 views

Do we need to know the true track to a VOR?

An aircraft can lock onto the location of a VOR and we can see the QDM (magnetic bearing to the station) to the VOR. If this is the case, do we still need to know the true track of that route? And if ...
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Where does the Garmin G1000 Nav ID come from?

If you tune in a NAV frequency into your G1000 the ID of the Nav Aid will be shown next to the frequency after some time. In this example SEA: Source: http://...
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Can I do a dual VOR check on the ground?

I know that the regs are ambiguous on the subject, but does anyone have a good argument as to why or why not you can do a dual VOR check on the ground if the VOR signal is good? For my particular ...
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4 votes
1 answer
171 views

Having trouble reading some charts (SBMG-SBLO)

I'm a flight sim user practicing instrument navigation with a short and apparently simple flight, SBMG to SBLO (South America). The distance between the two airports is 49.5 nautical miles (the ...
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4 votes
1 answer
207 views

Just how inaccurate are (Las Vegas) VOR radials?

I was discussing VOR-based navigation with a pilot, and he mentioned that VOR doesn't provide a very high level of integrity and safety (at least, compared to GPS or DME). He explained that the FAA ...
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What's the difference between a Sole Means Navigation System and a Primary Means Navigation System? [closed]

For bonus points, how you define a supplemental means navigation system?
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3 votes
4 answers
3k views

What is the difference between a non-directional signal and an omidirectional signal from a radio aid?

NDB's are non directional and VOR's are omnidirectional. What is the difference between a signal that is non directional and a signal that is omidirectional, if any?
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6 votes
1 answer
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What turn to intercept a radial and how to tune in B737ng sim?

Forgive my very amateur questions, I have been out of flying for years now and I am getting fit to fly again after slight setback. I have an opportunity of doing some refresher flying in 737NG ...
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2 votes
1 answer
167 views

What official government document should a pilot check to determine what magnetic north a VOR was set to when it was commissioned?

Today I learned that VOR stations are all set to magnetic north at the time of commission, and since magnetic north moves, the VOR is not necessarily in-line with magnetic north in the present. Where ...
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-3 votes
1 answer
422 views

Why does this VOR's compass has an arrow pointing north east?

The VOR compass here has an arrow that points to the north east. I never saw an VOR compass like that. What is the explanation?
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3 votes
1 answer
251 views

Why does the Hinch Mountain VOR (as an example) have void areas below certain altitudes published in the U.S. Chart Supplement?

I was digging around the SE region Chart Supplement, and I was reading KSRB (Sparta, TN), and this "VOR unusable" listing is contained in it: The sectional chart shows that it is nearly on top of a ...
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1 vote
1 answer
250 views

How does the ICAO VOR separation apply to reciprocal radials?

If two aircraft are on VOR radials that are apart by 15 degrees or more and one aircraft is at least 15 DME out, they are considered laterally separate. I read this rule in ICAO documents but my ...
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1 vote
1 answer
239 views

Is a VOR usable on the ground when it's located at a higher elevation than the receiver?

According to the AIM 1-1-8, a VOR can be usable at an altitude below the altitude where the VOR is. But the figure only shows the VOR service volume down to zero feet AGL: Where I fly, the VOR is at ...
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1 vote
1 answer
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How do I do these VOR time and distance calculations?

I'm trying to figure out the calculation to these questions: A pilot tracking a VOR turns 90 degrees from current heading. The pilot notes that it takes 3.0 minutes for the plane to intercept the ...
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1 vote
2 answers
3k views

What does the letter "D" next to the VOR frequency and name mean?

In most charts there is the letter D next to the VOR freq. What does this mean? I assume the H and L in brackets in other charts mean high and low VORs (correct me if im wrong). But what does the D ...
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5 votes
1 answer
4k views

What are the VOR channels used for?

I'm looking at different VORs on a sectional chart and I see the frequencies but I also see a channel number associated with them as well. What are these channel numbers and how do you use them?
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1 vote
1 answer
3k views

Calculating distance from VOR station with radial and heading

I am currently struggling to understand the following question regarding a VOR station and an aircraft. The aircraft is found in the 30 degree radial from the VOR station at time T(1) and T(2). During ...
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17 votes
3 answers
3k views

Are NDBs and VORs dying as a navigational method?

I am new to aviation, so bear with me on this question: I have read in multiple places that the VOR/NDB navigational aids are dying out to GPS. Is this true? Are more modern aircraft being built with ...
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6 votes
1 answer
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Why wouldn't KJFK offer the ILS for 22L?

(Source: Flightradar24) The above was from last Sunday around 17z. I was watching FR24 with the ATC feed. The airport was operating in 'arrival priority' with approaches to both 13L (Canarsie) and 22L....
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9 votes
2 answers
7k views

How do I determine which radial intercept angle to use?

I'm studying for the (EASA) Instrument Rating exam and I found several questions about radial intercept angles in sample exams but nothing in the books I've studied and my flight instructor doesn't ...
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7 votes
2 answers
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TFR based on an invisible VOR?

A new TFR was recently published, which references the Riverside (RIS) VOR/DME. When I look at the relevant chart in SkyVector, I don't see such a VOR in that area. When I put the ID "RIS" into ...
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11 votes
3 answers
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Is VOR identification automated in modern avionics?

Is the VOR identification via audible Morse code automated in modern autopilots / avionics? Or does a pilot in an A380 still sits in there, listens and compares the .-. .. -.. to her charts?
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0 votes
1 answer
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Does an aircraft equipment suffix denote how many VOR radios are installed?

I'm studying IFR. Does an aircraft equipment suffix specify if and how many VOR radios are installed? I'm guessing that the suffix is used by ATC to know if they can give you an RNAV or a an approach ...
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6 votes
1 answer
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Is my understanding of magnetic variation and declination (for a VOR) correct?

AIXM (the XML-based exchange model for AIP by Eurocontrol and european AIS) defines the following properties for a VOR: codeTypeNorthA code indicating the ...
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4 votes
1 answer
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How does one reverse direction on a VOR radial?

Tracking inbound, say on R-270, how do I track outbound on the same R-270? What intercept heading shall I fly?
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