The outer ring of the constellation table can't rotate, so what is the use of the outer ring scale?

Sports watches are generally equipped with a bezel that can rotate counterclockwise. In addition to decorating and symbolizing the modern concept of sports life, the protrusions on the bezel and the clearly readable numbers allow the wearer to accurately adjust the diving and sports time during exercise or use, which is absolutely reliable. The outer ring only rotates in one direction. Even if it rotates carelessly, the remaining movement time will only be shortened, not extended, ensuring safety.

As a series of sports watches, the symbol of bezel is just like sports. The scientific design principle makes the bezel no longer a decoration, and the design principle lies in being close to the movement.

That scale is used to time or measure diving time. You should be able to use it to time. I can tell you the diving time. This is more complicated. Generally speaking, diving watches that can rotate the bezel in both directions are unprofessional, and only watches that rotate the bezel in one direction (counterclockwise) are diving timers.

For example, if you want to dive, the service time of the oxygen cylinder is 15 minutes. Now the time is 12: 00. All you have to do is turn the scale of the bezel to the position of "3" (12: 15) and then dive. When your minute hand is close to the position indicated by your weighing scale, you are short of oxygen. In other words, if the minutes coincide with the scale, there is no oxygen.

If your diving time is 12: 10 minutes, then turn the scale to 12:25. In short, it is the current time plus the dive time (within one hour of oxygen supply). Why a single round? To prevent you from accidentally touching the bezel. Even if you accidentally touch it, the time will only be shortened counterclockwise to ensure safety.