I have seen this before on a IAC model however i am yet to see this on any other aircraft carrier (could not find one)
http://3.bp.blogspot.com/_o_no4M2xEPY/SapZ82ZDkQI/AAAAAAAAGG0/SIL8o243lKw/s1600-h/DSC01788-715918.JPG
the circled part
The two aircraft elevators are covered seems like a anti...