Skip to main content

Questions tagged [navigation]

Navigation is the process of planning and controlling travel from one location to another. There are many methods of navigation using different techniques and instruments.

Filter by
Sorted by
Tagged with
1 vote
1 answer
346 views

How does a pilot communicate with ATC during a hijacking?

How does a pilot communicate with ATC during a hijacking?
Arunabh's user avatar
  • 121
0 votes
0 answers
26 views

How does a winglet affect aircraft performance? [duplicate]

Winglets are small vertical surfaces attached to the wingtips. They help to reduce the drag caused by vortices at the wingtips, thus improving fuel efficiency. Source How does a winglet affect ...
Arunabh's user avatar
  • 121
3 votes
1 answer
102 views

Missing position (lat/lon) in ADSB data

I would like to ask if anyone has encountered latitude longitude (Data Item 021/130) missing in ADSB data, specifically in asterix cat 21. In addition to the mandador entries, there is also geometric ...
adam beno's user avatar
2 votes
1 answer
110 views

How to calculcute variation and compass deviation in this CDMVT problem?

Usually I can solve CDMVT problems, but sometimes I feel I'm missing something important. For example: I'm able to solve: Given WCA -012, TH 125, MC 139, DEV 002E. What are TC, MH and CH? ...
Mandal Vomva's user avatar
3 votes
2 answers
189 views

Engineless Blimp Navigation System

I understand wind direction can vary in a column of air? With only altitude control on a blimp to navigate for long flights, a blimp in theory could navigate without engines. In order to take real ...
Justintimeforfun's user avatar
-1 votes
1 answer
80 views

Can we use leaf shutter mechanism as a drone dropping mechansim for payload weight of 3lbs?

I'm considering implementing a drone payload drop mechanism capable of handling payloads weighing up to 3lbs. I'm intrigued by the idea of using a leaf shutter mechanism for this purpose, but I haven'...
Ujjwal's user avatar
  • 7
4 votes
1 answer
89 views

Question about MOCA and MEA

Why is there sometimes a MOCA on the chart and sometimes only an MEA? In the picture, there's only an MEA until BAGBY, and then MOCA appears after BAGBY. Do you know why this is happening?
user75593's user avatar
0 votes
1 answer
61 views

Question about V25 route's MOCA

I found something curious about the V25 route on the en-route low altitude chart. Before LAPED, there was no MOCA indicated, only an MEA of 9000. Why does MOCA 6500 appear after LAPED?
user75593's user avatar
0 votes
2 answers
107 views

The nav accuracy during SID and STAR

Does anybody knows is there any document where is described the nav accuracy during STAR and SID? I mean, how far can I deviate from the path as much as possible?
Michael Lindon's user avatar
1 vote
1 answer
348 views

Can this plane make it to an airport after dual engine failure?

If you are flying to the most remote airport(according to simple flying most remote airport is Mataveri International Airport), while flying on a typical airliner with normal weather, in the event of ...
Gabe's user avatar
  • 3,733
1 vote
1 answer
51 views

How can the derivative of the geodetic angles (lat, lon) be expressed by the Velocities in the NED-Frame?

I have found in the book "Unmanned Rotorcraft Systems" following expressions (eqn. 2.25 and 2.26). https://www.newbooks-services.de/MediaFiles/Texts/4/9780857296344_Excerpt_002.pdf $\lambda$...
Christian Mändle's user avatar
9 votes
5 answers
597 views

Do GPS coordinates of a fixed point in space ever change?

As I understand, GNSS uses the WGS84 model of the earth to pin-point points in 3D space. However, once the GPS coordinates of a point in space have been determined (say a GPS waypoint), do it's ...
PapaMike99's user avatar
2 votes
2 answers
303 views

Unusual pattern over English Channel

I have just spotted this Beechcraft flying an unusual pattern over the English Channel (late at night). It has no call sign etc. I'm thinking maybe a military aircraft looking for illegal migrant ...
Hew Williams's user avatar
8 votes
1 answer
197 views

ADIRU Mounting in Avionics Rack

If I understand correctly, navigational gyroscopes and accelerometers are located within the ADIRU boxes themselves. In order to initialise during aircraft startup, they must be mounted precisely ...
natanijelvasic's user avatar
0 votes
1 answer
163 views

What is the name of the dotted line that shows the predicted turn radius, found on the Navigation display of the 738

What is the name for the white dotted line that stretches out from the aircraft on the navigation display, when the aircraft enters a turn? It shows the aircrafts predicted flight path.
bok1942's user avatar
2 votes
1 answer
250 views

calculating TH,TC,MH,MC,CH,CC

...
Dan Nir's user avatar
  • 35
1 vote
1 answer
104 views

finding the approximate course change

I'm studying for my nav test (EASA ppl) I will be thankful for a good explanation solving this : ...
Dan Nir's user avatar
  • 35
1 vote
1 answer
164 views

Desired track for aircraft navigation

I am working on a flight planning application and I am need to calculate the desired track(DTK) of the current leg and upcoming legs of a entered flight plan. The formula and logic of solving that is ...
nabpp's user avatar
  • 11
1 vote
1 answer
153 views

Position Calls Relative to airport

Hey I’m a new student pilot to just trying to learn some new things here. I’ve been having trouble in recognizing and communicating my position with cardinal points relative to the airport in ...
DeadToMe 21's user avatar
0 votes
1 answer
85 views

ILS Frequency Assignment In Dual Nav Radio Setup

With a dual Nav radio setup (On autopilot panel) does the ILS frequency of the runway you're about touch down on need to be entered into both radios or just one? Cheers.
Seaharrier's user avatar
3 votes
2 answers
740 views

Is the GPS ground track true or magnetic?

This question arises from the Garmin GPS units (eg. GNS530 or GTN750), but the term ground track appears in a general context of GPS units so my question is also general. Is the ground track (TRK in ...
J.Lewandowski's user avatar
4 votes
1 answer
405 views

How to convert aircraft position from GPS to Local Tangent Plane (NED) coordinates?

Do these conversion formulas look correct? I'm writing my own local navigation script in Python, and I want to ensure that my understanding of the underlying math is solid. Reference location ...
Keith Blackstock's user avatar
2 votes
1 answer
210 views

How to fill out the Nav Log when reaching set heading point before the top of climb from the departure airport?

My current scenario is that I am flying from airport A to airport B. I need to reach 8000ft from sea level but it takes 22nm horizontally to reach that altitude and my first set heading point is 12nm ...
avidoni's user avatar
  • 21
7 votes
1 answer
547 views

Is it correct to say that the expected behaviour at a Fly-by/Fly-over waypoint derives from when there was no GPS, but rather just VOR/DMEs?

I was re-looking at Fly-by/Fly-over waypoints: and discussing with a colleague the topic of how these came about. Is it correct that this definitions were put in place so that a human pilot could fly ...
Federico's user avatar
  • 32.6k
1 vote
1 answer
591 views

Could "Lady Be Good" Incident Prevented by the Technology of its Time?

For those who don't know, Wiki page of the incident sums up. I don't have much knowledge about communication systems of WWII, but I know how radio communication work. This page has The aircraft flew ...
Lady Be Good's user avatar
4 votes
1 answer
2k views

How can I solve this question using the 1 in 60 rule?

What is the explanation for the question below in detail? A pilot is heading east and decides to fly to an alternate airfield which is 4NM south and currently 30NM from his present position. What is ...
Mango's user avatar
  • 185
15 votes
6 answers
9k views

Why don't planes (mostly airliners) primarily use GPS for navigation?

For the four airliners that I use in Microsoft Flight Simulator (A320neo, A319, A310-300, and 747-8I), I always have to align IRS and set up RAD NAV on the MCDU. Why can't we just use GPS? On the 747, ...
DaCuteRaccoon's user avatar
0 votes
0 answers
59 views

How many areas have RVSM being implemented worldwide?

The data provided by Eurocontrol and latest i could find is of 2003 from internet (source: https://www.slideserve.com/benjamin/cns-1207305 ). I wanted to know in how many areas still left where RVSM ...
Krishna Kanth's user avatar
5 votes
2 answers
2k views

How is TSO C145 equipment different from TSO C146 equipment?

From the AIM1-1-18 c1) C145 - "Airborne Navigation Sensors Using the GPS Augmented by the Wide Area Augmentation System" C146 - "Stand-Alone Airborne Navigation Equipment Using the ...
Name's user avatar
  • 924
13 votes
3 answers
3k views

Should turns always be standard-rate?

I know that the turn coordinator has markings that allow you to turn at a particular rate, so you can use the TC and a clock or stopwatch to turn a particular number of degrees. Are you always ...
Someone's user avatar
  • 7,097
4 votes
1 answer
381 views

What does it mean for a GPS PRN to be unserviceable?

There is a current NOTAM: !GPS 02/035 GPS Navigation PRN 28 unserviceable Feb 21, 2023 2020Z to May 31, 2023 2359Z What exactly does it mean for a GPS PRN to be unserviceable, and what significance ...
Chris's user avatar
  • 16.4k
3 votes
2 answers
321 views

Why do we measure translational accelerations but angular velocities in an IMU aircraft?

I am wondering why we measure for attitude of an aircraft its angular rate (instead of angular acceleration) and for the translational channel the acceleration instead. The computers can integrate ...
Kevin's user avatar
  • 31
3 votes
1 answer
549 views

When is it required to enter an airway? (IFR)

Assuming I'm not using a computer program to generate a flight plan for me, for cross-country IFR flight planning in the United States, how quickly after finishing departure procedures is one supposed ...
acker9's user avatar
  • 133
0 votes
0 answers
103 views

Why do they say PBN is under RNAV?

PBN exists under the umbrella of area navigation (RNAV). [FAA AIM, Section 2. Performance-Based Navigation (PBN) and Area Navigation (RNAV)] As far as I know, RNAV and RNP exist under PBN, and as an ...
rockybear's user avatar
  • 131
2 votes
3 answers
283 views

Can a commercial aircraft fly at night with complete navigation and communication equipment failure?

Disclaimer: I know there are numerous redundancies and the complete failure of navigation and communication system may not be possible. Hence, let's approach this question as a pure thought experiment....
Arpit Tyagi's user avatar
2 votes
1 answer
1k views

What is the difference between position and navigation lights on light training aircraft?

What is the difference between position and navigation lights on light training aircraft (or general)? When I search for both, I find the same lights: red on the left, green on the right, and white on ...
pilot162's user avatar
  • 2,227
-1 votes
1 answer
122 views

FMC and MCDU not talking

I have a test bed in which the FMC and MCDU are hooked up to one another. FMC menu was populated on MCDU and was able to be navigated. After making some changes to the FMC GPS #2 lines, the FMC ...
Ace's user avatar
  • 1
0 votes
2 answers
239 views

Why isnt the structure of the aircraft affected by high true air speeds or high ground speeds?

Let's suppose that in Cruise flight I exceed the VNE in TAS or in ground speed, why isn't the structure of the aircraft affected by the high speeds? I am sorry for my english, I am not a native ...
Andres's user avatar
  • 11
1 vote
2 answers
210 views

Communicating one's ground position by sighting an overhead aircraft (M*A*S*H)

In an episode of the 1980's television show M*A*S*H, several of the characters are stranded in the wilderness when their vehicle breaks down. In an attempt to communicate their position to any allies ...
John Gordon's user avatar
2 votes
1 answer
95 views

How can stand numbers 1, 2 and 3 have the coordinates of 07.9 minutes North ins, but stand number 9 have the coordinates of 07.8 minutes North?

How can stand numbers 1, 2 and 3 have the coordinates of 07.9 minutes North ins, but stand number 9 have the coordinates of 07.8 minutes North? As can be seen from the blue line I drew visually, ...
pilot162's user avatar
  • 2,227
1 vote
1 answer
418 views

Getting Minimum Grid Area Altitude from navigational chart

One of the questions for the EASA PPL(A) exam sounds like this: What is the highest Minimum Grid Area Altitude between BERTA (point 1) and LJLJ (Ljubljana) along route A (yellow)? And the following ...
Tudor Ravoiu's user avatar
0 votes
2 answers
2k views

Easy way to calculate distance between two GPS coordinates

I'm studying for my EASA PPL(A) exam, and for some questions for the Navigation exam, I'm requested to calculate the distance between two points, like so: What is the distance from VOR Brünkendorf (...
Tudor Ravoiu's user avatar
3 votes
1 answer
5k views

Understanding UNOS and exceptions from it

I'm studying for my EASA PPL(A) exam, and one thing that I came across are the following questions: Q: An aircraft in the northern hemisphere intends to turn on the shortest way from a heading of 270°...
Tudor Ravoiu's user avatar
0 votes
0 answers
206 views

GNS 430 Instrument Panel Self Test Page OBS readout does not agree with OBS Hdg selected on CDI

Our Newly installed Overhauled GNS 430 OBS readout on the Instrument Panel Self Test Page does not agree with the Heading selected on our CDI. Prior to the 430 overhaul they agreed perfectly. ...
Tunahawk's user avatar
0 votes
1 answer
6k views

Calculating True Course, Magnetic Heading and Compass Heading when Wind, True Heading, Magnetic Course and Deviation is known

I came across another exercise while studying for my PPL(A) exam where I would need some help with some calculations. The question sounds like this: Given: WCA: -012°; TH: 125°; MC: 139°; DEV: 002°E ...
Tudor Ravoiu's user avatar
5 votes
1 answer
228 views

How is rotational dynamics related to navigation?

I've been learning how to do dead-reckoning using just an ordinary IMU chip (a 3-axis accelerometer and a 3-axis gyroscope). In a number of textbooks I've read on aircraft navigation, the motion of a ...
KMC's user avatar
  • 193
-1 votes
1 answer
190 views

Calculation of density altitude

When using an e6b flight computer which temperature will I use with the pressure altitude to get the density altitude
Godsfavour's user avatar
4 votes
2 answers
181 views

How to determine QNH zones like New Zealand did?

I saw a file stating that New Zealand has 11 zones and was wondering how it was determined and divided, does anyone have any idea? the paper offers a short description that doesn't cover much ...
Zol613's user avatar
  • 41
7 votes
3 answers
2k views

How many channels does the VOR have?

VORs are assigned radio channels between 108.0 MHz and 117.95 MHz. How many channels are in-between? I guess that each decimal value represents 1 channel? for instance (108.1)(108.2)(108.3)(108.4)........
knowledgeloverx's user avatar
-4 votes
2 answers
154 views

How do VOR beacons detect?

I assume that any military aircraft can find the position to any VOR ground station. Is the VOR invisible to the military aircraft?
knowledgeloverx's user avatar

1
2 3 4 5
10