How do planes still go missing with all our technology?

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JTB.SDG

Puritan Board Junior
I am completely astounded that planes, like the one carrying the soccer player recently, can still go down and nobody has any clue where they are. How is this possible? I can install an App on my smartphone that would allow me to locate it's precise location. Fitbits have built in GPS locators that will register your location at all times. I am failing to understand how it's possible for entire aircrafts to go missing in light of all the technology we have today?
 
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There are several factors:

One is that the earth is round and radar locations are on land. Thus, when something is flying over the water, it can easily dip below the horizon or the line-of-sight for a radar tower. According to a news article I read, the plane was flying low at 2,300 feet when it lost contact. Depending on the height of the radar tower, you wouldn't be able to see something that low beyond 50--70 miles away (it's below the horizon). I have no idea where radar stations are located in France or England but it wouldn't surprise me to know the plane was too low to be out of sight of any of these systems.

Additionally, there are two types of radar: primary (where the signal is sent out and reflects off objects and the echoes are received), and secondary (more like a two-way radio, where the aircraft's transponder automatically replies to requests for location information). Air traffic has almost entirely moved away from primary radar to secondary, so it's possible their transponder was not functioning properly or failed. Secondary has similar line-of-sight issues as well. 2,300 feet is very low for an aircraft.

Next, a cell phone needs to communicate with a tower in order to update or communicate its location. Towers have antennas that efficiently direct energy near the ground (where the cell phones are), which is why you lose connectivity when up in the air. If you are even a few miles out over the water, there are no towers and there is no way to update your location.

Lastly, GPS receivers are just that: receivers. They do not communicate with satellites, they receive multiple signals from multiple satellites and calculate (triangulate) a location. They still have to have a way to communicate that location for it to be of any help in this situation. A Fit-bit could know its own location, but it couldn't communicate that to anyone without a connection.
 
The Loch Ness monster and Bigfoot have existed for millenia, but even despite vast teams looking for them, they are able to elude us humans. So a plane going missing is very possible.
 
While I certainly believe dimensional portals are real (google Project Montauk; CIA), there is an easier answer: the government or elites do not want them to be found.
 
Speaking as a pilot, this one mystifies me. The aircraft is reported to be a Piper Malibu, which is a sophisticated high-performance aircraft for general aviation. Most are equipped with a form of emergency locator transmitter (ELT) that is coordinated with a GPS receiver/transmitter that will give position locations updated frequently. The newer 406 ELTs do communicate with satellites--that is, they send messages to GPS satellites which are relayed to search and rescue.

I don't know about Britain/European operations, but in the US, this kind of aircraft would probably have been on an IFR flight plan and probably would have a transponder and other equipment sending out position reporting signals constantly. GPS tech, as JTB noted, has gotten very sophisticated. Alaskan bush pilots rely on it and many have installed the systems that would locate them within 10 feet in the event of a crash.

I suppose if there were a catastrophic airframe failure, the ELT may have been destroyed before it could emit an emergency signal. If the aircraft hit the water and immediately went underwater, maybe a signal would not have reached the satellites.

Some of these advanced features are on a subscription basis. It may be that the owner of the aircraft opted to not use them. If the only contact air traffic control had was a radar fix, it is less surprising that the aircraft would be lost in a remote open water area.
 
in a remote open water area.

Looks like it would have been about 100 miles over water, but most of the way not that far off the coast. It was apparently close to Guernsey and Sark when it disappeared. Guernsey has scheduled air service and a 4800 foot runway. The 5500 foot runway at Jersey was probably about another 25 miles or so away to the south.

Past Guernsey, there is a small airport on Alderney some 15 or 20 miles further on. Then another 50 or 60 miles to the English coast.

The last comments from the soccer player are strange, to say the least.
 
Looks like it would have been about 100 miles over water, but most of the way not that far off the coast. It was apparently close to Guernsey and Sark when it disappeared. Guernsey has scheduled air service and a 4800 foot runway. The 5500 foot runway at Jersey was probably about another 25 miles or so away to the south.

Past Guernsey, there is a small airport on Alderney some 15 or 20 miles further on. Then another 50 or 60 miles to the English coast.

The last comments from the soccer player are strange, to say the least.

The more one looks at it, the stranger it seems. My first guess was that there must have been some immediate and unanticipated catastrophe--like a mid air collision with a big bird or even an explosion, etc. But the messages from the passenger indicate that something was wrong for quite a while.
 
Speaking as a pilot, this one mystifies me. The aircraft is reported to be a Piper Malibu, which is a sophisticated high-performance aircraft for general aviation. Most are equipped with a form of emergency locator transmitter (ELT) that is coordinated with a GPS receiver/transmitter that will give position locations updated frequently. The newer 406 ELTs do communicate with satellites--that is, they send messages to GPS satellites which are relayed to search and rescue.

I don't know about Britain/European operations, but in the US, this kind of aircraft would probably have been on an IFR flight plan and probably would have a transponder and other equipment sending out position reporting signals constantly. GPS tech, as JTB noted, has gotten very sophisticated. Alaskan bush pilots rely on it and many have installed the systems that would locate them within 10 feet in the event of a crash.

I suppose if there were a catastrophic airframe failure, the ELT may have been destroyed before it could emit an emergency signal. If the aircraft hit the water and immediately went underwater, maybe a signal would not have reached the satellites.

Some of these advanced features are on a subscription basis. It may be that the owner of the aircraft opted to not use them. If the only contact air traffic control had was a radar fix, it is less surprising that the aircraft would be lost in a remote open water area.

Thanks for interacting in a meaningful way. It seems that by now first world countries would have enacted the kind of legislation that would require all commercial aircrafts to carry this simple technology? I thought we learned our lesson from the Malaysian Air plane that went missing? I guess not? How many more before governments start requiring this kind of stuff?
 
Thanks for interacting in a meaningful way. It seems that by now first world countries would have enacted the kind of legislation that would require all commercial aircrafts to carry this simple technology? I thought we learned our lesson from the Malaysian Air plane that went missing? I guess not? How many more before governments start requiring this kind of stuff?

Well, a lot of factors come into play. The Malaysian aircraft didn't subscribe to the position reporting service for whatever reason. It is not required by legislation, but almost all the major airlines use it because it makes their operations more efficient.

But the flight in question here is on the small end of the spectrum. It is a 6 place airplane, high-performance compared to smaller single-engine aircraft, but it remains in the "general aviation" sphere instead of the air transport sphere. It would be cost prohibitive to require a small airplane to require the same equipment as jetliners.

Having said all that, technology is changing fast, and amazingly reliable systems are within reach of small aviation, too.

Leaving that aside, after reading more about what is known of this loss, I am fairly certain that air traffic control knew exactly where the aircraft was until it dropped below 2300 feet. That is, no doubt, where the search began. They probably had a pretty good idea of its speed and heading at that point, too.

If it plunged straight into the ocean, no amount of equipment would have helped locate it. If it did a controlled ditching, there is a high likelihood that ELT equipment designed in the 70s would have allowed it to be located.

There's a saying among aviators about wrecks: no point in speculating until the facts are known, but we will go ahead and speculate anyway. That's where the general public is at this point.
 
Thanks for interacting in a meaningful way. It seems that by now first world countries would have enacted the kind of legislation that would require all commercial aircrafts to carry this simple technology? I thought we learned our lesson from the Malaysian Air plane that went missing? I guess not? How many more before governments start requiring this kind of stuff?

I hope you think I've also interacted in a meaningful and helpful way---nothing of what I said was tongue in cheek or meant to be condescending. I'm not a pilot but I work for the Federal Aviation Administration as a radar engineer for en route radar systems, both civilian and military. My degree is in electromagnetics and wireless communications so this in my area of expertise. En route traffic relies largely on ground-based systems for location and 2,300 feet is too low when you're that far out over the water for any kind of ground-based radar system, be it ADS-B, ATCRBS, Mode S, or primary. I was also trying to help you with how the location technology in your cell phone and Fit-bit works.

I'm not an expert in ELT systems but as I understand they send out a distress signal (g-force activated) which (at least with the older systems) did not include a location. The older systems were picked up by ground stations or other pilots and then a rough location was obtained to be honed in on later. This plane may very well have had an older system, if it had one. As I understand, the newer systems do communicate with a satellite (battery-powered for up to a couple of days) but it can take up to two hours for a satellite to come into view. With something that crashed into the ocean, that signal would be attenuated too much by the water to be received so it almost doesn't even matter what kind of a system this had, unless it had a third kind of visual emergency beacon specifically for a water landing.

As to why governments don't require things like this, there are any number of technologies that could be incorporated, but they are expensive. Satellites are expensive. Satellite communication is expensive. I personally don't think it should be a requirement for every pilot to buy thousands of dollars worth of equipment for a "just in case" situation, but those who care certainly may. Physics and earth geometry is still the primary deterrent to universal adoption.
 
I'm a retired Marine Communications Officer. I think really have no idea how their cell phones or communications systems work. My kids just think that "internet" is something that is *there* somehow. Try driving up to a mountain in West VA with no radio towers anywhere near you and you'll realize that you don't just have something tracking you anywhere you go.

Even if a plane is floating on top of the water and has a GPS signal from overhead satellites that is receive only. The satellites don't, themselves, track position.

Terrain and other factors cause radio signals not to propagate. Try connecting to your 5GHz WiFi mroe than a few hundred feet away.

If that plane is underwater then, even with a transponder, radio waves don't travel very far underwater.
 
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