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      Watchdive Blog

      The role of the bezel of the diving watch

      The role of the bezel of the diving watch

      In short, the bezel of the dive watch is used to indicate the dive time and is a device to ensure life safety. The outer ring of the diving watch usually has a dot or triangle representing the time of departure, and then clockwise with a minute scale of 10, 20, 30... With the same luminous pointer. Many watches use a one-way rotation, even if they accidentally knock down during diving and produce rotation, it will only shorten the diving time, but will not increase it.

      Generally, a diving cylinder can supply 50 minutes of human breathing, so the diving time cannot exceed 45 minutes, which requires a clear understanding of the diving time underwater. When entering the water, rotate the outer ring to align the starting point or triangle with the current minute hand as the start, and then enter the water. Then the minute hand continues to move forward. Under water, you can pass this mark and the current minute hand position difference, check the outer circle number, you can know the dive time and estimate the remaining oxygen.

      • The first method is to choose the position of the bright spot on the watch dial or the triangle indicator to align with the current minute hand. The wearer can understand the current dive time through the position of the relevant minute hand underwater, so as to easily Calculate the remaining oxygen amount to ensure timely grasp of the time to dive.
      • The second method has a certain predictability. It can estimate the time the wearer needs to rise by measuring the oxygen content and the time of ascent in advance, and set it to a specific time point. When the bright spot on the watch dial or the triangle When the indicator is aligned with this position, it can be determined that the wearer needs to float up.

      The rotating bezel can be said to be one of the important features of a diving watch, which serves as a reminder of the diving time. The marking scale of the rotating bezel is 15, 30, 45, because the general diving oxygen tank can only last for 45 minutes, and some are marked with a 60-minute scale. The first 15 minutes are colored or specially marked, and the diver will make a 15-minute safety stop when ascending in order to discharge the nitrogen absorbed from the cylinder. Usually, just turn the bezel during diving, make the 0 scale on the bezel align with the minute hand, and then look at the scale on the bezel after the minute moves to know the diving time.

      What is diving watch?

      What is diving watch?

      What is diving watch? as the name implies, refers to a watch for diving (a watch that has been treated with water and moisture resistance for divers. General waterproof watches cannot be used for diving. Diving watches must comply with strict regulations and are not waterproof. Strong can be called a diving watch. Simply put: the diving watch should have higher waterproof performance, and have luminous hands and scales that are convenient for reading the time in the dark.


      Although the deep sea is full of fun to explore, unpredictable dangers may also occur if you are not fully prepared. At this point, a reliable diving watch not only lets you know the time, but also helps you complete the journey smoothly. The source of this safety is not only the excellent waterproof depth of the diving watch itself, but also the following five Function.


      Function 1 Corrosion resistant flexible strap

      Under water, no matter whether you wave your arms or operate equipment, we need our wrists to rotate flexibly. At this time, the watch needs to be tightly fixed on the wrist. Although many diving watches are equipped with metal straps, the chemical composition in the seawater will cause slight corrosion to them, so it is still recommended to replace them with rubber straps with better water resistance and corrosion resistance during diving. Nowadays, some brands are also specially developed It is also a good choice for a canvas or man-made fiber strap.


      Function 2 Screw-in non-slip crown

      Where is the easiest part of a watch to get water? The answer is definitely the crown, because the crown is the only part that connects the outside world and the movement. In order to prevent water from entering the movement through the crown, watchmakers developed a design called screw-in crown—a waterproof apron made of rubber is added to the connection of the crown, when the crown is tightened , The water is tightly isolated from the watch (similar to the rubber pad at the water pipe valve in our home). There are also many diving watches to upgrade it, they not only have a larger crown, but also add deeper pit processing on it, making it more non-slip and convenient for underwater operation.


      Function 3 Helium exhaust

      "Exhaust helium" is a very professional function, it is usually used for professional diving watches (waterproof above 1000m). Because it is impossible for a full-time diver to go back and forth to the surface every time when working in the deep sea, it will waste too much time to decompress (see the watch class). Therefore, they must live in a deep-sea high-pressure diving cabin for a long time, but at this time, a considerable amount of gas will be dissolved in the blood, so the air used in the general diving cabin is a "helium" oxygen mixture. Since helium molecules are smaller than water molecules, when we are under high pressure for a long time, helium molecules will penetrate into the waterproof watch to fill it with high-pressure helium. Once it returns to the surface, if the high-pressure helium in the watch cannot be shortened When time is exhausted, the watch will explode due to high pressure.


      Function 4 luminous indicator

      Under water, we will strongly feel the yearning for light. As a basis, all diving watches will be equipped with eye-catching luminous hands and scales. Usually the pointer, scale or surface of the diving watch will be coated with fluorescent material, and the size of the pointer and scale will be enlarged to make it easier for divers to read. The early luminous material was radium, which was discontinued because it contained excessive radioactive elements. The most commonly used luminous material is Super-LumiNova. It absorbs the gamma particles in the light to store light, and can continue to emit light for more than 10 hours (but the luminous intensity will have an attenuation effect after a certain period).

      Function 5 rotating bezel

      The rotating bezel serves as a reminder of the diving time. The marking scale of the rotating bezel is 15, 30, 45, because the general diving oxygen cylinder can only last for 45 minutes (some are marked with a 60-minute scale). The first 15 minutes are colored or specially marked, because divers will strictly observe a 15-minute safety stop when ascending for diving decompression. Usually, just turn the bezel during diving, make the 0 scale on the bezel align with the minute hand, and then look at the scale on the bezel after the minute hand moves to know the diving time. Of course, you can also use it as a countdown timer. First know your diving time, turn the bezel to align the minute scale with the minute hand, and then the time when the minute hand moves to the 0 scale of the bezel is exactly your diving limit time. The rotation of the external bezel is mostly designed in a single counterclockwise direction. This is to ensure that the calculation time is only large, not small, and to prevent delays and dangers. In recent years, the newly emerging built-in chronograph bezel has no restriction on the direction of rotation, because the crown that controls the bezel must be locked before launching.

      The world's first dive watch-Blancpain Fifty Fathoms

      The world's first dive watch-Blancpain Fifty Fathoms

      Now, in terms of diving watches, I believe many of my friends will think of Rolex, it is so popular! Some people even think that the world's first diving watch is a Rolex, but I can tell you clearly that this is not the case. Rolex produced the world's first waterproof watch. The first diving watch should be Blancpain Fifty Fat.

      At that time, in 1952, shortly after the end of World War II, the French government established an assault frogman unit. Then I encountered a problem, that is, there is no suitable watch that can be worn and used underwater. For team members performing special tasks, a unified time can help unified actions.

      After several twists and turns, the commander of this special forces found Mr. Fichte, the CEO of Blancpain. Blancpain was much smaller in scale and popularity at the time, but it was precisely because of its small size and no shelf, and Mr. Fichte himself was an avid diving enthusiast, so Blancpain eventually took over the watch development of the assault frogman unit.

      In 1953, Blancpain's fifty Fat series was born, slightly ahead of the Rolex Submariner in the same year and the Omega Seamaster 300 released in 1957, becoming the earliest diving watch.

      Two areas you may overlook!

      Two areas you may overlook!

      The most direct way is to keep the watch away from the magnetic field. There are too many opportunities for mechanical watches to be exposed to magnetic fields in real life. For example, they are placed next to electrical appliances that generate magnetic fields (such as stereos, refrigerators, computers, etc.), magnetic objects (such as magnets, mobile phones), and women use handbags to switch Magnetic buckles and magnetic buckles for men's mobile phone cases may cause the watch to be magnetized, which will cause the watch to be inaccurate or stop temporarily. These details require you to pay extra attention when wearing them.

      So if the watch has been accidentally magnetized, how to demagnetize the watch? It is best to send the watch repair department to demagnetize, because there are special equipment for demagnetization, which can restore the watch's time to normal. If you far away from a watch shop, you can find a circle-shaped iron block that is not magnetized and place it on the table. Slowly wear the watch through the circle of iron blocks. The magnetism on the watch will be lost. It is absorbed by iron; you can also put the watch on a clean iron plate without magnetism, so that the magnetism of the watch will gradually disappear after two days.


      The watch is left unused for a long time

      Misunderstanding: Watches can be roughly divided into quartz and mechanical watches. Many people do not have the habit of wearing watches every day, so they often place them, which will cause the internal parts of the oil to precipitate, which will make the watch inaccurate.

      Coping method: Some problems need to be paid attention to for quartz watches that are not used for a long time. The so-called long-term is beyond the expiration date of the battery. Quartz watches are basically silver oxide batteries. Like other types of batteries, silver oxide batteries will self-discharge even when they are not in use (such as in storage). Therefore, I suggest that if you have long-term storage of quartz watches, especially high-end watches, it is best to send the watch to a repair shop and take out the battery first.

      Although mechanical watches do not need batteries, improper maintenance can also damage their life. If you wear it every day, the best maintenance method is to tighten the clockwork every two weeks to ensure that its gears run smoothly. Rotate the crown gently until you can feel a slight urgency. If it is left unused for a long time, it is best to wind 1-2 times a month. When the clockwork is completely relaxed, it is best to turn the crown 20 times to restart the drive system of the movement so that the watch maintains the internal mechanism. The device operates normally and accurately.