I read a couple of stories about people who were either on a large ship of that sank, went on a scuba diving excursion or for some other reason found themselves left in the middle of the ocean. I think that this is one of the most scariest things that could happen. Even though I am a great swimmer, I think that I would just feel terrified being in the middle of the ocean. For this reason, any time that I go out in a boat, I always make sure to tell plenty of people where I will be. I have also thought about bringing along a cell phone and giving someone mobile tracking software that they can use just in case I don't return when I say I will.