My fathers girlfriend knows someone that has contacts to someone who has an uncle that has a relative that was married to a lady which was related to a person who has overheard someone discussing airliners flying over wet areas...
Why should an aircraft with essentially the same avionics and a common type rating to 767, the most widely used A/C used to fly the Atlantic ocean, not be permitted to do the same. Well, as stated previously, they are.
BTW, I have flown across Lake Michigan a number of times in 757's, I never got wet feet .
My 2 ¢
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." (Albert Einstein, 1879 - 1955)