v-tail
I recommend you go back to about June 1 2009, and the posts in the original thread, and the original search thread. Consider how many seasoned pilots who fly transocean routes at similar altitudes offered up some initial insights on what faces such a crew. See also the weather reconstruction info in those threads by a very thorough meteorologist.
Put another way, reductionist summation like yours masks something called "causal factors."
Happy reading.