Every four days in port for almost two years I stood an internal security watch on the carrier I was aboard. We looked for drug use, bad guys, and whatever else might cause problems. I, and the guy that went with me, could prowl anywhere we wanted. I will assure you it was boring duty. To liven it up a bit, I made it a goal to locate some space on the ship I had never been to, and, in two years, I never failed. These are BIG ships.