All Questions
Tagged with navaids navigation
14 questions
2
votes
1
answer
660
views
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:
...
- 123
10
votes
1
answer
466
views
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 ...
- 246
9
votes
2
answers
1k
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 ...
- 6,813
1
vote
2
answers
335
views
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 ...
- 269
2
votes
1
answer
148
views
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?
- 9,072
1
vote
0
answers
318
views
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 ...
- 6,813
2
votes
1
answer
1k
views
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?
- 25
-6
votes
1
answer
2k
views
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 ...
- 8,567
14
votes
1
answer
14k
views
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, ...
- 1,113
10
votes
2
answers
3k
views
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?
- 2,466
10
votes
2
answers
10k
views
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 ...
- 5,291
27
votes
2
answers
58k
views
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?
...
- 7,072
8
votes
2
answers
2k
views
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 ...
- 185
30
votes
6
answers
23k
views
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?
- 14.6k