Linked Questions

4 votes
1 answer
5k views

What was Korean Air 672 doing at the time of Malaysia Air 370's disappearance? [duplicate]

In the first part of this YouTube video, you can see an aircraft supposedly flying 4x faster than the surrounding aircraft, at the time the Malaysian 777 went missing. After replaying this on Flight ...
Danny Beckett's user avatar
0 votes
1 answer
163 views

What made the below flight path to have very low speed during the middle of its course [duplicate]

This is an ongoing flight details of my in-laws travelling from Frankfurt to India. I observe the speed of the craft is drastically reduced to 100mph and then picked up normal. Could someone please ...
user avatar
7 votes
1 answer
798 views

Is this a glitchy ADS-B signal? [duplicate]

I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different ...
KORD4me's user avatar
  • 1,779
2 votes
1 answer
589 views

Why is this 777 zig zagging over the Pacific (and delayed by 2.5 hours in air)? [duplicate]

Why is this 777 (CX 806 on June 6 2017) zig zagging over the Pacific (and delayed by 2.5 hours in air)?
Jessica's user avatar
  • 21
0 votes
1 answer
522 views

Sudden drop in speed and altitude? [duplicate]

Can someone tell me exactly what happened on this flight? It was a brief moment of sudden drop in altitude (6000 feets) almost at the same time with a drop on engine powers. It's a drop of signal from ...
Steve's user avatar
  • 9
1 vote
0 answers
155 views

Are 360s by a B777 common in the holding pattern? [duplicate]

I found this forum having tried to find the answer on Google. I was on a B777 coming into Heathrow from Miami yesterday (AA56) and was expecting us to go into the usual hold. The attached picture ...
Will's user avatar
  • 11
3 votes
0 answers
60 views

Ground Speed On Approach [duplicate]

I'm not a pilot, just a bit of frequent flyer and moderate aviation enthusiast. I sometimes get on Flightaware and check on the flights I frequent and see the path that was taken and flight time. I ...
Not-A-Pilot's user avatar
16 votes
6 answers
5k views

How can ADS-B replace primary radar when FlightRadar24, using ADS-B, is so inaccurate?

I read the following on Flightradar24.com's 'How it works' page. The percentage of aircraft equipped with ADS-B receivers is steadily increasing though, as they will become mandatory for most ...
Sanchises's user avatar
  • 13.4k
19 votes
2 answers
34k views

What is an Inertial Navigation System? How does it work?

In this question, the answer notes that some ADS-B systems are connected to Inertial Navigation Systems (INS), and says they are less accurate than GPS. What exactly is an INS? A couple sub ...
Jae Carr's user avatar
  • 24.2k
6 votes
1 answer
2k views

Why would an aircraft's position be so inaccurate?

Normally when we follow an aircraft on flight radar, the track is very accurate and not noisy. I just clicked on an aircraft that has a very inaccurate trace. What might cause this?
spikey_richie's user avatar
6 votes
1 answer
2k views

Why did the Flightaware groundspeed readout suddenly spike for this flight?

My 18yr old son is currently in Barcelona - first time abroad and in a plane. Being an overprotective parent I thought I'd track his flight so I could see when he had landed safely = and save the data ...
swansrus's user avatar
3 votes
3 answers
1k views

Why does ADS-B broadcast velocity?

I just read on opensky-network (scroll down to the section "facts") that ADS-B transmits roughly as many velocity as position messages. Since the velocity of an aircraft can be computed from two ...
Gab's user avatar
  • 33
15 votes
1 answer
2k views

Why would FlightAware show this meandering flight path?

Today's BA219 from LHR to DEN (2018-03-20) appeared to fly 5 zigzags just before and over the Hudson Bay in Canada at around 18:15z. Prior to that, its flight path matched its planned route very ...
Ned Gladstone's user avatar
4 votes
1 answer
546 views

Dash-8 Speed momentarily drops on takeoff

I was on a Dash-8 back in July and August. Looking at Flightradar 24, the speed is non constant and very choppy. It even goes down momentarily during the takeoff process. I believe that the Dash-8 ...
phkc070408's user avatar
1 vote
1 answer
826 views

What is the relation between altitude and vertical speed?

I recently saw 2 graphs on a flight path on BBC, shown below. For those interested, it's the path of the recently crashed Boeing 737 max flight ET302, but that's irrelevant to my question. My ...
ElRudi's user avatar
  • 111

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