"whisky-dave" wrote in message
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On Wednesday, 20 December 2017 18:56:14 UTC, Rod Speed wrote:
"whisky-dave" wrote in message
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On Tuesday, 19 December 2017 16:59:47 UTC, Rod Speed wrote:
"whisky-dave" wrote in message
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On Monday, 18 December 2017 16:58:36 UTC, Rod Speed wrote:
whisky-dave wrote
Rod Speed wrote
whisky-dave wrote
Vir Campestris wrote
whisky-dave wrote

The economical cruise altitude rises as the plane gets
lighter,
so they want to climb gently all the way across the ocean.

But they don't do that.

True, but thats for other reasons.

Yes because they donl;t like losing radar contact with planes,

Thats a lie with the long haul flights
over the ocean. There is no alternative.

they are in the minority presently.

Irrelevant.

And when the system handles those fine,

whe it does,

It already does.

Doesn;t on all,

Corse it does.

a number of flight disapear from radar, especaily
those more than about 200 miles from the coast.

And the flight still completes fine, because the INS
get the plane to where its supposed to go and it
doesnt matter a damn that its not visible on the
radar when it more than 200 miles from the coast
and ACARS and ADS-B lets the system see that its
still where its sposed to be.

I donlt think the seefax technology of
teh 70s will be kept for much longer.

Yep, long range radar is on its way out now.

Yes but then again it never really existed.

Bull**** it didnt.

no point in having full radar coverage over
the long haul routes over land when its
nowhere near any major airports.

True but the problem is it can't be done cheaply.

Corse it can, gps and acars isnt expensive in heavys.

those are NOT radar though that is the point.

The point is that they eliminate the need for radar that
can see planes in the middle of the 3 big oceans.

GPS is the way forward ceefax is outdated but doesn't
need much bandwidth so has it's limited use.

Utterly mangled all over again.

only about 10% of the world is covered by radar

So your stupid pig ignorant claim that planes are only allowed to fly
where there is radar coverage is just that, a stupid pig ignorant claim.

I never claimed that.

Corse you did with your stupid claim that they fly down the coast so they
are still in radar coverage. Pigs arse they do when flying from the RSA to
Perth, across the pacific, from south america to europe etc etc etc.

I said it was the reasons most flight don;t go direct across oceans

Most do in fact follow the great circle route. In spaces now that they
have much longer range so they dont need to make refuelling stops.

is because of lack of radar coverage.

Even sillier and more pig ignorant than you
usually manage and thats saying something.

Have a look at the routes between the RSA and Perth,
across the pacific, from south america to europe, etc
etc etc. There is **** all in the way of radar coverage on
those routes and they are used all the ****ing time anyway.

so that's a lot of space not covered by radar

Yep.

and a lot of space where planes could be.

They have always been there, most obviously with
the atlantic and pacific and indian oceans etc.

But they haven't in genral

Corse they are.

because sending a plane there means it canlt be tracked

Corse it can be and is with ACARS and ADS-B

so if all airlines sent their planes to a similar
area not trackable by radar is risky.

Even sillier and more pig ignorant than you
usually manage and thats saying something.

They are fully tracked using ACARS and ADS-B

It will be replaced as ACARS isn;t in real time

Thats is a bare faced pig ignorant lie.

No it isn't.

http://www.bbc.co.uk/news/world-asia-pacific-26544554

While GPS (Global Positioning System) is a staple of modern life, the
world's air traffic control network is still almost entirely
radar-based.

That is just plain wrong with the long haul routes over oceans.
Its talking primarily about the heavily congested areas around
airports, not the long haul routes between them.

"almost entirely radar-based"

ONLY in the congested areas around airports.
NOT in the middle of the ****ing ocean.

Aircraft use GPS to show pilots their position on a map,

Utterly mangled all over again.

but handling large volumes of flight data is expensive

So is radar.

ADS-B will see aircraft work out their position using GPS
and then relay data to the ground and other planes.

Its been doing it for quite a while now. And isnt what
is used around the heavily congested major airports.

and can be turned off.

So can transponders.

Yes they can, but not by accident or error.

Just as true of ACARS and ADS-B. In fact the
arsehole flying MH370 turned his off deliberately.

Someone did and we don't know why,

Corse we know why, so no one could track it once it headed south
down the indian ocean, so the plane would be impossible to find
once that arsehole had ditched it and could prove that he was
such a complete arsehole as to commit suicide that way and have
that impossible to prove so his family would still get the payout.

you can;t turn it off from the cockpit either.

Still completely trivial to do.