Ian W
well said - good study
beggars belief with the latest technology now (and its cheap) that ETOPS is given out for 3 hours or more (5.5 hours max) with major safety recording instruments that record just for 30 mins and batteries that give up in 30 days plus the signal given off is poorly identifiable it seems.
its nonsense now...
considering these ETOPS aircraft now have been given that sanction which no doubt takes them further over very remote seas and land masses that technology has been not applied retrospectively -