So many responses, thank you! I might have been harsh on the first post on my aunt, and I can understand those of you who dive without them due to preference or budget concerns, but I just hated how she acted like she knew everything and that dive computers are for stupid people. I am also mad that she is going to Cayman with me, which is going to be VERY expensive, and wants to save a little money on something that can make a HUGE difference, and even tries to justify it with vague remarks sent by email. I wholeheartedly understand the dive table, but memorizing it was not a part of my certification, whether you condemn it or not. I believe that I need a dive computer for this trip. I will get a dive computer one way or another. And I made a mistake when I said "maximize bottom time." I'm not going to wait seconds until my DC time is coming to the end, I just believe that electronics nowadays are more accurate than crude tables. I may be biased in that my instructor said many a time to use a dive computer, but I just think that it makes sense. I think this thread boils down to, was she right in what she said in that email excerpt?