I took mine b/c I wasn't sure either. Isaid to the guy that I brought it not knowing if he needed it. He said no, not really..but glanced at it anyway. I'd take it if you have any doubts.
Carnival Fantasy 6/05
RCCL Sovereign of the Seas 4/07
RCCL Navigator 12/07
RCCL Navigator 11/08
RCCL Liberty 7/4/09