What's the use of the dial on the outer ring of a watch?

Generally, watches with rotating dial outer ring are diving watches and flight watches. As the name suggests, these watches were originally designed for divers and pilots. Rotating bezel is one of the important features of diving watches, which can help divers control diving time. The rotating bezel of diving watch plays the role of reminding diving time, which is designed for the safety of divers. The marks on the rotating bezel are generally 15, 30, 45, and there are also 60 emerging diving watches, because diving oxygen tanks can only last for 45 minutes. Extended information: Note: 1. Wind it up every 24 hours to ensure that you have enough power to jump to the sun when you walk. When winding, lift the watch to the position of 12, and turn the watch handle clockwise to wind it. Be careful not to turn the watch handle hard after winding, so as not to break the winding shaft or spring. 2. To adjust the calendar quickly, you need to pull out the watch handle, dial it counterclockwise for 3 to 4 hours, and then dial it back clockwise for 12 minutes, and the calendar will be adjusted quickly for one day. Pull out the watch handle and turn it, so that the hour hand, minute hand and pointer turn clockwise twice, or make the calendar jump forward one day. 3. Adjust the length of the strap, fine-tune the position of the movable pin, and greatly adjust the strap shaft to be disassembled. 4. Try not to touch water, steam, high temperature and corrosive gas when using, so as not to cause unnecessary damage to the movement and appearance. At the same time, avoid strong vibration and stay away from strong magnetic field environment.