One day some years ago, a couple diving on a boat with us went deeper than we felt comfortable with on the second dive (so we stayed well above them), and when they got back in the boat both their (borrowed or rented) computer displays were flashing. They were clueless that it meant that they had blown a deco stop. Their biggest concern was when they found out that the flashing displays meant that the computers would not work for 24 hours; they had afternoon dives scheduled later that day. I hope they got through the day OK.