I've spent about three years of my life underway(at sea), on aircraft carriers and amphibs(harriers and helos). The sounds the harriers make seems like some of the loudest. EA6B's are pretty loud too. Even several decks down and in spaces inside of other spaces the sound is pretty intense. Believe it or not you get used to it and it rarely even wakes you up when your sleeping. Someone talking nearby is more likely to bother you. On the carriers the sound of the catapult hitting its stops when launching is louder than the jets, when you are down below.