My dive buddy's computer died on him during a live aboard trip in Chuuk. He had to sit a day before the boat would allow him back in the water with a loner computer. Since that trip, I have used a backup for any multi dive trips.
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If you have a dive watch, do you set the bezel?
For the people who dive a watch, I'm curious how many of you do a time hack before you splash? If you have a dive watch, do you set the bezel? How many of you actually use a dive watch as intended, and how many of you just have a watch with you?
(as in buy a Shearwater and use the aqualung as a backup).