"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
...
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.

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.

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.

Didnlt find Malaysia Airlines Flight 370 did it.

Because they chose to turn theirs off to save on the cost.

So how comes they couldn't use radar to find where the plane was ?

Because its not possible to have full radar coverage over oceans
as big as that.

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.

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.

And planes arent forced to fly where there is full radar coverage
either, most obviously between the RSA and Australia. The
alternative works fine and has done for well over half a century
now. In spades with the Pacific and southern Atlantic.

No it doesn't capacity is being lost

That is a bare faced pig ignorant lie.

and planes are taking longer routes because of it.

Another bare faced pig ignorant lie. They fly the obvious
great circle routes with very little radar coverage at all.

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.

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

Utterly mangled all over again.

but this data is not usually shared with air traffic control.

Utterly mangled all over again. Thats what ACARS does.

Some of the most modern aircraft are able to
"uplink" GPS data to satellite tracking services,

Thats ACARS and that is becoming a mandatory requirement.

but handling large volumes of flight data is expensive

So is radar.

and such systems are usually only used in remote areas with no radar
coverage.

Even sillier and more pig ignorant than some fool journo usually manage.

The satellite data which suggests flight MH370 flew on for several
hours are basic 'pings' sent by the plane, and so far only help to
identify two very approximate flight corridors north and south.

Because that very budget airline chose to not pay for full ACARS
coverage even tho their aircraft are fully equipped to use it.

Over the next decade, a new system called ADS-B (Automatic
Dependent Surveillance Broadcast) is expected to replace radar
as the primary surveillance method for air traffic control

And that isnt the gps you pig ignorantly rabitted on about.

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.