As sad as any accident is, the loss of separation features prominently among ATSB reports, and that's when they are under positive control air traffic wise. The fact was bought home to me while looking up 747 events on their web site recently. The worlds largest mid air death toll was the result of a 747 and Il-76 meeting over India, the largest potential was a JAL DC-10 and JAL 747 missing each other by 10 metres at FL360. Didn't QF have a 747 miss a C-5 by a like amount over Malaysia or Thailand, result of the C-5 giving a wrong estimate?