![]() Compared with that lack of competence and that criminal negligence, the crew's "lack of airmanship" is minute. ![]() Yes, the mistake was a contributing factor yes the poor software was a contributing factor but the clear and single cause was a series of errors by ATC starting with an incomplete clearance, continuing with losing communication and failing to give increased vertical separation and culminating with effectively instructing two planes to fly into one another. ATC, on the other hand should have (a) advised them of the mistake and (b) if not corrected, kept other traffic at least 2,000' away from them. They made a mistake they failed to notice the mistake. I have been getting increasingly incensed at the consistent criticism of the American pilots' "airmanship". Well I've just spent the evening reading the whole report. The simple fact is, if either one of these planes had offset 0.1 nm, this particular thread would not exist! Redesigning the air routes so that they are all one way traffic may be the answer, but in the mean time while two way air routes still exist, I can think of no better technique to mitigate the current risks. I think in the end, common sense should prevail. Of course I just made the numbers up but it illustrates the point I am trying to make. I'd say that is a very good trade in risk!! Even more so if they both offset (180 metres x 2 equals 360 metres). (That is to say, two aircraft flying in opposite directions on the same air route, at the same altitude, navigating with the assistance of GPS which is capable of determining position to within a metre or so is going to mean they WILL end up at the same place at the same time, yet if the tracking of one of the aircraft is offset by 0.1 nm (180 metres) they are highly unlikely to collide. Well I'm not in a position to challenge that statement, however I my intuition says that the risk would be for all practical purposes the same.īut OK lets say the risk of collisions at intersections is twice as likely, no lets say it is ten times more likely!, 10 x one in a million is still only one in one hundred thousand, yet by doing this, you reduce the risk of a collision such as the one in Brazil, from almost certainty (one in two) to one in one hundred thousand. ![]() ![]() Offset increases the risk of collision at intersections. ![]()
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