Dream of

I was in a submarine, I was the radar man, we were on a world war two sub, it felt so real, we were talking and having fun, but I was not experienced at radar, there was a sheet explaining what to do, while I was reading it, I guess the sub was hit and it filled with water, I held my breath, I knew I was going to die, and then it went back to the beginning of the dream like it was a rerun, but I knew I was dead