Wouldn't have guessed that! There I was thinking it was something hi-tech, some ultra-sophisticated towed sonar system, or torpedo decoys, or anti-sonar prop-noise masker or something mysterious and top-secret!
Bumpers! Maybe they could add a little chrome, and some pin-striping. Maybe some good bumper stickers, like "My other boat is a canoe", or, "If you can read this, you landed short".:rotfl:
Oh well, what's a few tons of weight welded on to the back of a super carrier? I doubt the captain even noticed she went down by the stern, say, a quarter of an inch.