How to use the diving watch chronograph

The rotating bezel can be said to be one of the important features of the diving watch, which serves to remind the diving time. The rotating bezel has a scale of 15, 30, 45, because the oxygen bottle for diving can only last for 45 minutes, and some are marked with a 60-minute scale. The first 15 minutes are coloured or specially marked, and the diver will strictly observe a 15 minute safety stop during the ascent to completely release the nitrogen absorbed from the cylinder. Usually, just turn the bezel while diving, align the 0 mark on the bezel with the minute hand, and then watch the minute on the corresponding bezel to know the time spent on the dive.