I've always wasn't clear on how or why ETOP came to be, and much less the importance of it until I saw this simple video, which made things clearer for me. Not being a real world airline pilot, I never bothered with, since I just contained myself to flying a Piper Archer around my Kansas City neighborhood. 

 

The first forced water landing in commercial aviation did not end up so well. 

yes sure

thanks for sharing, the simple vedio makes me clear how or why ETOP came to be