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Questions tagged [surveillance]

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20 votes
4 answers
8k views

How are aircraft separated in a non-radar environment?

In remote areas that have no radar (oceanic airspace, etc.) how is aircraft separation maintained so that airplanes don't get too close? What do areas that normally have radar do when there is a ...
Lnafziger's user avatar
  • 59.1k
7 votes
3 answers
3k views

To what extent is modern "maneuverable spy balloonery" really a thing?

There's a high altitude balloon in the news recently. It seems to have come from the Pacific, passed over Canada and is now over the US. I don't have any official tracking data but notional ...
uhoh's user avatar
  • 6,168
4 votes
3 answers
967 views

What aircraft would have these tail numbers?

Last night I was looking at a flight radar on my phone, and I saw two blips flying close to each other over Camden, NJ. They were heading northeast at around 250 knots, and the only information ...
Colin Pierce's user avatar
4 votes
2 answers
2k views

Why doesn't ADS-B use satcoms like ADS-C?

With ADS-C, in the middle of remote areas (like ocean), we can send position report via satellite data link. So, why ADS-B systems on airplane uses ground based stations (VHF datalink) rather than ...
Mustafa's user avatar
  • 43