Questions tagged [navaids]
Equipment which assists pilots in navigation, such as a VOR.
47 questions
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Why do navaids noted in the chart supplement have a W next to them?
Why do navaids noted in the chart supplement have a W next to them?
Thanks
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How to identify a NDB on a garmin 430W or GTN650?
I have a Garmin 430W and a GTN 650 interfaced with a G500H in my aircraft. I can program either to go direct to an NDB. The question comes as to whether or not I can identify the navaid. Reading ...
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What are the modulation parameters of a DME?
I am having difficulties finding specific information about DME pulse pair modulation. As far as I understand, the gaussian shaped pulse pairs are modulated using amplitude modulation. The carrier ...
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Navaid information on SID
I noticed this information under the navaid boxes on the Logan Four departure from KBOS. What do they mean? Additionally could you point me to what publication they would be explained in?
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FAA and Eurocontrol waypoints with same ID
It seems that the FAA and Eurocontrol have waypoints with the same ID.
For example, the route between KJFK and LFPG for a recent ...
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What is magnetic variation under RADIO AIDS TO NAVIGATION in FAA Chart Supplement, and How to use it?
I'm going to use couple examples to ask my question:
Looking at KBVY chart supplement, it says:
...
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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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Looking for source of Navaids and fixes for an application I am writing
I was able to get a list of airports and runways from the FAA site but cannot seem to find a list of these items. https://www.openaip.net/navaids?field_openaip_navaid_type_value_many_to_one=2&...
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Do GPS systems in modern avionics mitigate against spoofing attacks?
There exist a number of different techniques [PDF] to mitigate (or at least detect) GPS spoofing, but the most effective techniques require access to the military-only M-code [PDF]. However, there was ...
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Why do none of the procedures for EFSA use the SVL VOR-DME?
This is inspired by this question. Looking at all the approach and STAR charts for EFSA in Savonlinna, Finland, they are all RNAV. The Linna VOR-DME is not used for any of them even though it is ...
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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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Is flying direct to a navaid considered a leg with track guidance?
When I design SID or Missed approach procedure with a typical sequence of initial legs like "Climb to 5000 feet on R-123 ABC VOR/DME, turn left/right direct to ABC VOR/DME", the regulation ...
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Help reading a FAA departure procedure chart
I was hoping to get a few answers regarding how to read a FAA departure procedure chart. Let's take the JUDTH SEVEN DEPARTURE chart shown below:
From what I can tell, it seems that the diagram in ...
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Why do IFR charts show TACAN paired frequencies when there is no collocated VOR?
The image below shows a low IFR chart with a VORTAC on the right and a TACAN on the left. I understand the VORTAC is labelled with both VOR frequency and TACAN channel so that a civilian user could ...
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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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Why would an ILS installation need a “reflecting surface” around the glideslope antenna?
According to the NTSB, the installation of a glideslope serving runway 11 at KHTS (Tri-State Airport, Huntington, West Virginia) was delayed for over twelve years by the lack of suitable terrain for ...
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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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Why are the VHF and UHF airbands directly adjacent to frequency bands used by vital radionavigation aids?
Of the three main frequency ranges used by aircraft for radio communications (HF, VHF, and UHF), two (VHF and UHF) have their aircraft-radio-communications frequencies clumped together into a ...
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What's the busiest airport that's not WGS-84 compliant?
Most latitude and longitude coordinates are defined relative to the WGS-84 standard, including GPS coordinates from your receiver. However, some coordinates are specified using local datums, and ...
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What, effectively, does a navaid being unmonitored mean?
I saw a NOTAM about a VOR being unmonitored. I think this means that the voice capability of the VOR frequency is not in operation/nobody is listening. Is that right? If so, it just seems like ...
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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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What kind of input is used by NASA's TASAR?
I've found the Aviation SE to be a really interesting read so far, I'm excited to be here! I'm fairly new, but I'm also old!
What are the inputs for TASAR to crunch flight path optimization? Is it ...
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Reason for the multiple sidelobes in an ILS glideslope signal
Why are there multiple side lobes in the glide slope signal from an ILS?
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What is the difference between an Non-Directional Beacon and a Compass Locator Beacon?
What is the difference between a Non-Directional Beacon and a Compass Locator Beacon?
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Has mod percent changed for Mark-1 glide slopes?
Mark-1F glide slopes operate at 80 percent modulation. What was it for earlier versions i. e. Mark-1C, Mark-1D, etc.
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What is the minimum separation for navaids to work properly without interfering?
What is the minimum separation between navaids (for VORs/DMEs and NDBs) for them to work without interfering, by regulation and by functionality?
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Ambiguous mention of NAVAIDs with duplicate names in FAA's CIFP file (ARINC-424 18 format)
I am studying FAA's Coded Instrument Flight Procedures (CIFP) dataset (link), coded in ARINC-424 18 format, and I noticed that navaids are coded for the purposes of an IFP simulation only by their ...
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How to calculate DDM in a ILS dual frequency system?
I'm working in a project where I have to process ILS baseband signals. I have no problem obtaining DDM value from single frequency signals, nor the individual components of a dual frequency signal (...
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Is it true that there are VOR/DME and/or TACAN stations in the oceans?
Are there any VORs placed in the oceans for navigation. Is it true that VORs or TACANs are placed on ships to help oceanic flights, for example flights across the Atlantic?
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Do pilots of modern aircrafts still use maps, gps and compasses to find airports? [duplicate]
Do pilots of modern aircraft still need to navigate using maps, GPS and compasses to find airports?
Alternatively do they use some sort of fully automated system that navigates the aircraft via ...
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What is the difference between a VOR and a VORTAC? [duplicate]
Confused about the difference between a VOR and a VORTAC?
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Where are US FIS-B UAT ground facilities located?
In the US there are Flight Information Services Broadcast (FIS-B) transmitters strategically located to provide WX, NOTAMS and other flight information utilizing the ADS-B infrastructure. ADS-B has ...
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What's exact offset degree dividing localizer and LDA?
When a localizer is offset at an angle with the runway track, it functions as a "Localizer Directional Aid or LDA." What's the exact offset degree dividing them? Any offset degree greater than 0 makes ...
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How does the ADF null positions find where the NDB is?
I understand how it operates for the most part, although I don't understand how the null positioning works. This image below doesn't include the sense antenna that limits it to one null position, ...
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What's the meaning of underlined frequency in sectional chart nav aid box?
There is a statement to describe the underlined frequency in legend, it says:
Underline indicates no voice on this frequency.
What does this mean? We still need to ident the Morse code, doesn't it?...
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What are the differences between a VOR and a VORTAC? [duplicate]
In Brazil airspace, we do not have VORTACs to navigate (unfortunately). That's why my doubts about accuracy, the range, the possible systems/frequencies they operate, and if there is any restriction ...
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How do you know if a VOR is High, Low, or Terminal?
Is there any way of telling on both a VFR and IFR chart what type of VOR we are looking at?
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Why would a VOR be decommissioned leaving the DME?
As can be seen on this question and this question the OJC VOR has been decommissioned but the DME is still active. What would be the purpose in having DME without VOR?
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How else can snowy/icy conditions disrupt airport operations?
In casey's fabulous answer here, he identifies several ways snow/ice can disrupt airport operations:
Continuous heavy snowfall can eventually close an airport if it
becomes impossible to keep the ...
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What does the crosshatching mean on this VOR-DME?
I noticed that the frequency of this VOR-DME is covered by crosshatching.
The FAA chart guide says this "indicates shutdown status."
What does this mean? Is this navaid being decommissioned?
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Why does a DME ground station wait 50 microseconds?
The FAA says that a DME ground station sends a response exactly 50 microseconds after having received an interrogation from an aircraft. For what reason is there a 50 microsecond delay?
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How are Victor airways defined and numbered?
I am wondering how Victor airways get determined.
What determines how many 'segments' they are? For example some airways connect two VORs only, while other airways stretch across (or "connect the ...
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Where to find a waypoints/fixed points, navaids and airports database?
I wonder if it is possible to download a database with waypoints, navaids, airports and airways between them. I've been working with AIP documents but it's difficult to get raw information from them ...
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How does ILS (Instrument landing system) work?
How does ILS (Instrument landing system) work?
I know it provides guidance to the runway by two signals, one modulated at 90 Hz, the other at 150 Hz, but how the airplane lock on those signals?
...
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What's the precision of a modern Inertial Measurement Unit, and how is it obtained?
This recent comment reports that:
the IMU on new (plane) would localize the aircraft to within 3 feet
after a cross-country flight, without any GPS input other than the
starting location.
I ...
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How do airliners cross the ocean without GPS?
How do airliners cross the ocean without GPS?
Do they use dead-reckoning or are there navigation aids floating out there?
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How precise is an ILS (Instrument landing system)?
I read that an ILS is a precision approach system. It provides a final approach with precision in both horizontal and vertical guidance to the runways. But I don't know how precise it is because there ...
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