I'll ask the commander when he comes in this morning if he knows the origins of this. I never asked why they were called tigers when I was aboard the last carrier I worked on, but something quite amusing was when they first told me tigers were aboard, I couldn't quit thinking (silently of course) why they were carrying exotic wildlife aboard a ship. Then when I went down to birthing, one of the female AVCM's was helping one through a terrible bout of sea sickness, and I realized what an actual tiger was. Good thing I kept my mouth shut. I've learned that it only takes one time of messing up something around a sailor, and you will have someone to pick on you for a lifetime about it.