Originally Posted by
Advance
NO mikethepomme. Rather the reverse. As I pointed out early in the chain, the whole point of having radar is to increase safe capacity beyond that available without radar. But in doing so it must be recognised that any failure may leave an unsafe, overcapacity situation. The safety case is intended to examine failure modes (FMEA) and ensure there are systemic redunancies and excess capacities so that a failure does not necessitate traffic reduction precisely because in the time it takes to actually reduce traffic there is an excess beyond safe capacity.
The FAA actually carried out an extensive study on the subject before they introduced ARTS I - what, back in the '50's.
The latest info in the Sydney newspapers (they must be right??) is that the system failed to "uncombine" from night mode when called upon to do so, leaving but one console working.
A software change is being blamed. So clearly the safety case justifying the change, if it was prepared at all, did not address the failure mode that eventuated.
Sure, systems fail but safety is about ensuing the failure does not increase risk.
Advance, you dont have a clue what you are talking about, and obviously have no familiarity with ATC in Australia, in particular Eurocat, perhaps keep your mouth shut lest you make yourself look like a fool.
The issue was of the 2 LAN connectors, when one fails the other takes over, in this case, path A didnt fail gracefully, it kept sending messages, so many in fact that the Sydney partition became overloaded, then the melbourne system, then the brisbane system. It was a very unusual failure, one that hasnt happened before anywhere in the world that has run Eurocat.
What this meant was that positions couldnt be moved split or whatever; resulting in curfew setup continuing beyond curfew period.
Safety was never effected.
Radar was never effected.
The ability to process more than say 10 arrivals an hour was impacted.
Literally zero of your suppositions in this thread that you have raised are even close to correct.