Wasn't a Dash 8 pilot gaoled for manslaughter (or at least charged) over a crash in New Zealand a year or two ago, using cockpit voice recorder transcripts as evidence?
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I see that the moderators have resurrected the two links on offsetting mentioned a few pages back.
Worth reading, if only to see that this topic was covered in depth ten years ago on PPrune.
http://www.pprune.org/pub/tech/MidAir2.html
http://www.pprune.org/pub/tech/MidAir.html