ETOPS
Yes reasonable, for twins considering the problems involved.
Having said this, do think that anything
exceeding 180 minutes is stretching it to the extreme.
Having been a 3/4 engine driver for a
very long time, including trans-Pacific (where runways are not exactly expansive), suspect that
if 240 minutes becomes the norm, then a wet footprint can be expected.
And also expect....the results ain't gonna be pretty.
