Name: レーダーなしで航空機の安全を守る北大西洋の軌跡 (Keeping Aircraft Safe without Radar: The North Atlantic Tracks)
Uploaded: 2021-01-14T10:36:29.000Z
Duration: 3 min 35 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

- I am 35,000 feet above the North Atlantic,

somewhere just south of the tip of Greenland.

there's no real-time view for an air traffic controller to know

where all the hundreds of planes sharing this airspace currently are.

How do we avoid getting a bit too close to any of them?

This is the Nav Canada Area Control Centre in Gander, Newfoundland.

these are some of the folks keeping you safe.

- The North Atlantic tracks are the airways

that we develop each day for our eastbound aircraft

who fly across from us over to the UK area.

by our counterpart over in Scotland via Prestwick Centre.

The way the North Atlantic works, there's basically two main airflows.

During the night time, our night time here,

most of the aircraft leave North America and fly across to the UK.

And during the daytime, most of those same aircraft return.

We start with our day-shift, comes in early in the morning.

We'll ask all these aircraft to send in their preferred routes for that night.

Eastbound aircraft, all the aircraft want to get into the main jet stream

to pick up that tailwind so they can save money and fuel and time.

From all that, we'll develop a set of tracks based on that flow,

and once the tracks are published in the morning, airlines then have

to decide on what track they want to follow that night.

- The tracks can look curved and inefficient on the flat map projections we're used to

but you've got to remember, they're great circle routes.

They're the shortest, and cheapest way around the globe of the earth.

And also, the tracks are three dimensional.

Planes can be separated because they're on a different track,

or because they're on different positions on the same track,

- It's a requirement for an aircraft to give us a position report

And we take that information, and we apply it to the aircraft's route,

and we can kinda predict where he's gonna be too.

When there's no radar coverage, there's two main forms of communicating

with the aircraft over the Atlantic Ocean.

We can go through our radio operators, our flight service operators,

is like a form of text message, you could call it.

and I can tell exactly where that aircraft is at that point in time.

side-by-side, which is our lateral separation,

As time progresses, airlines get better equipped,

we'll probably have all our tracks at 30 miles apart from each other.

Longitudinal, which is one aircraft behind the other,

We can reduce that down to a five minute standard if airliners are equipped.

Some nights, you can just sit out on your patio

on a nice clear night, and you can see numerous aircraft,

and they look like they're all on top of each other, but basically,

they're all at least 1,000 feet apart, if not more.

They just have to be separated in one dimension basically.

As soon as an aircraft gets too tight to another aircraft, we interject and say,

okay, we need to slow you down, or speed you up,

If a plane has an emergency, they have contingency procedures.

TCAS is their Traffic Collision Avoidance System.

and an aircraft did something it wasn't supposed to do,

that plane has a TCAS system that says, okay you have incoming traffic,

you have to climb, or descend, or whatever the resolution is, right?

So as soon as we're made aware of an emergency situation,

we look at separation, we try to move what aircraft we can,

and we provide a conflict free clearance for that aircraft,

- Thank you very much to everyone at Nav Canada,

You can find out more about them and the tracks at the links in the description.

字幕リスト動画再生

レーダーなしで航空機の安全を守る北大西洋の軌跡 (Keeping Aircraft Safe without Radar: The North Atlantic Tracks)

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instance

conflict

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