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Preventing mid-air collisions.

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Old 8th Jul 2009, 12:42
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Don't you love the way CASA is protecting the system "status Quo".
I mean the last couple of mid airs at Bankstown and Moorabbin have occured due to and/or just outside the GAAP CTR at or approaching the inbound approach point, and not the responsibility of ATC.
It is the system that is flawed as was the subject of much debate on Pprune some months ago. To chanel everyone to one or two points at the same altitude without the guidance of ATC is madness.
We should do it like elsewhere in the world where you approach direct to the field at different altitudes and tracks and only descend when you have the assitance of the Tower under positive separation.
But ofcourse this will entail the regulator and ATC taking responsibility and being accountable not to mention up to speed like anywhere else in the modern world.
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Old 8th Jul 2009, 12:42
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Traffic density perchance?
Density is relative isn't it?








(After all the airspace becomes pretty dense when 2 planes are in very close proximity doesn't it?)
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Old 8th Jul 2009, 13:06
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Density is relative isn't it?

(After all the airspace becomes pretty dense when 2 planes are in very close proximity doesn't it?)
No. Density is an average over a given volume. You've changed the volume to encapsulate a transient event. Doesn't really tell you anything useful like how likely such events are.
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Old 8th Jul 2009, 20:48
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Thanks. I was being sarcastic.
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Old 11th Jul 2009, 14:50
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What a waste of money on a few bits of paper. My wife laughed when she saw it, like that's going to help! - rather than telling us how to fly an aircraft, would the money not be better spent on providing better services - radar separation for instance... remember flight following???

From a risk management point of view when looking at the heirachy of control, administrative controls is right down there with PPE, being one of the least effective controls, but unfortunately most commonly used! Next time CASA, send me a hat - it would more useful! Better still, write to me telling me how you have improved a service!

Rather than build a hospital at the bottom of a cliff, put a fence at the top!
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Old 11th Jul 2009, 15:44
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A complete review of the use of VFR entry points to GAAPs is needed.

Recently I was reporting inbound into Carrum when I heard another 2 aircraft reporting inbound from Brighton. I then heard a 4th aircraft reporting inbound at Carrum at 1500', exactly where I was ! I strained my neck and rolled from side to side to see if he was immediately above or below me but to no avail. It subsequently transpired that the 4th was actually inbound from Brighton, and his erroneous radio calls could easily have put the other 2 aircraft at risk of collision.

I report inbound at GMH when I am directly above its saw-tooth roof (creates situational awareness for others) but on countless occasions I have witnessed other pilots report inbound at GMH when they were actually miles ahead, behind or off-track.
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Old 11th Jul 2009, 23:49
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I read over mine, and then it went straight in the bin.
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Old 12th Jul 2009, 10:38
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Mid airs

Yep placed mine in the recycling bin.
A couple of hours later, a tenant in another apartment had taken it!
Make of that what you will!
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Old 13th Jul 2009, 03:38
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Rather than build a hospital at the bottom of a cliff, put a fence at the top!
Ahh but they can charge you for the use of the hospital...

And you can sue them if their fence didn't do its job of protecting you from falling. Better to have no fence and say it's your responsibility to stay away from the edge - that way its all back on you!
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Old 13th Jul 2009, 05:22
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A couple of hours later, a tenant in another apartment had taken it!
Make of that what you will!
Dob him in if you don't like him, he's got Mary Jane at his place

Last edited by PlankBlender; 13th Jul 2009 at 06:21.
 
Old 13th Jul 2009, 23:02
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The little poem below was published in a "crash comic" some years back. I think this is what you are quoting from. As gutso-blundo notes today it has legal applications;

And you can sue them if their fence didn't do its job of protecting you from falling. Better to have no fence and say it's your responsibility to stay away from the edge - that way its all back on you!


The Ambulance in the Valley

'Twas a dangerous cliff, as they freely confessed,
Though to walk near its crest was so pleasant;
But over its terrible edge there had slipped
A duke, and full many a peasant.
The people said something would have to be done,
But their projects did not at all tally.
Some said 'Put a fence 'round the edge of the cliff,'
Some, 'An ambulance down in the valley.'

The lament of the crowd was profound and was loud,
As their tears overflowed with their pity;
But the cry for the ambulance carried the day
As it spread through the neighbouring city.
A collection was made, to accumulate aid
And the dwellers in highway and alley
Gave dollars or cents - not to furnish a fence -
But an ambulance down in the valley.

'For the cliff is all right if you're careful,' they said;
'And if folks ever slip and are dropping,
It isn't the slipping that hurts them so much
As the shock down below - when they're stopping.'
So for years (we have heard), as these mishaps occurred
Quick forth would the rescuers sally,
To pick up the victims who fell from the cliff,
With the ambulance down in the valley.

Said one, to his pleas, 'It's marvel to me
That you'd give so much greater attention
To repairing results than to curing the cause;
You had much better aim at prevention.
For the mischief, of course, should be stopped at its source;
Come, neighbours and friends, let us rally.
It is far better sense to rely on a fence
Than an ambulance down in the valley.'

'He is wrong in his head,' the majority said;
'He would end all our earnest endeavour.
He's a man who would shirk this responsible work,
But we will support it forever.
Aren't we picking up all, just as fast as they fall,
And giving them care liberally?
A superfluous fence is of no consequence,
If the ambulance works in the valley.'

The story looks queer as we've written it here,
But things oft occur that are stranger
More humane, we assert, than to succour the hurt
Is the plan of removing the danger.
The best possible course is to safeguard the source
By attending to things rationally.
Yes, build up the fence and let us dispense
With the ambulance down in the valley.

Joseph Malins 1895
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