Although the deep underwater world is full of fun to explore the unknown, there is also the possibility of unpredictable danger if you are not fully prepared. At this time, a reliable diving watch will not only let you know the time, but also help you successfully complete this wonderful journey. The source of this security, in addition to the diving watch’s solid waterproof depth, is also reflected in the following 5 major functions.
Bell & Ross INSTRUMENT BR02
Function 1 Anti-corrosive flexible strap
水下 Under water, no matter we move our arms or operate the instrument, we need to flex our wrists flexibly. At this time, the watch needs to be closely fitted and fixed on the wrist. Although many diving watches are equipped with metal straps, the chemical composition in the seawater will cause slight corrosion, so it is still recommended to replace with rubber straps with better water resistance and corrosion resistance during diving. Some brands now also develop A canvas or rayon strap is also a good choice.
This watch is equipped with a wide rubber or synthetic fiber strap. The reserved strap length can fully enclose the thickened underwater thermal diving suit, which is not only flexible and safe.
Tag Heuer 500m CALIBRE 5 & ldquo; All Black & rdquo; watch
Function 2 screw-down non-slip crown
哪里 Where is the most susceptible part of a watch? The answer is definitely the crown, because the crown is the only part that connects the outside world with the movement. In order to prevent water from entering the movement through the crown, watchmakers have developed a design called a screw-in crown & mdash; & mdash; & mdash; a waterproof rubber ring made of rubber is added to the joint of the crown. When tightened, the water is tightly isolated from the watch (similar to the rubber pads at the water pipe valves in our home). There are also many diving watches that have been upgraded. Not only do they have larger crowns, but they also add deeper pits to them, making them more slippery and convenient for underwater operations.
The screw-down crown makes deep groove patterns easier to grasp, and it also has double-layer safety washers to enhance the dust-proof and waterproof effect.
Mido Perfection Automatic Helium Diver Watch
Function 3 rows of helium
& Ldquo; Helium discharge & rdquo; belongs to a very professional function, it is usually used for professional diving watches (waterproof more than 1000m). Because it is impossible for a full-time diver to travel to and from the sea every time he works in the deep sea, this will waste too much time on decompression (see the watch class). Therefore, they must live in a high-pressure diving tank in the deep sea 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 diving tank is generally a mixture of helium and oxygen. And because helium molecules are smaller than water molecules, when we are under high pressure for a long time, the helium molecules will infiltrate the waterproof watch and fill it with high-pressure helium. Once it returns to the water surface, the high-pressure helium in the watch cannot be shorter. When the time runs out, the watch will explode due to high voltage.
独特 Its unique automatic helium exhaust valve treatment can ensure that the watch is absolutely safe and reliable even if it is placed in a deep-sea diving cabin for a long time.
Tudor HYDRO 1200 watch
Function 4 luminous indicator
Walking in the dark and helpless water, we will strongly appreciate the yearning for light. As the basis for reading underwater, all diving watches will be equipped with eye-catching luminous hands and scales. Usually the hands, scales or surfaces of diving watches are coated with fluorescent materials, and the dimensions of the hands and scales are deliberately 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 intensity of the light emission will have an attenuation effect after a certain period).
Its wide hands and hour markers are added with a luminous coating. Even the original fine second hand has added a dot-dot luminous indicator at the end, and of course also includes a 12-point shield-shaped logo.
Hublot King Extreme Deep Sea Quest Dive Watch
Function 5 rotating bezel
The rotating bezel reminds you of the diving time. The scale of the rotating bezel is 15, 30, 45, because oxygen cylinders for general diving can only adhere to 45 minutes (some are labeled 60 minutes). The first 15 minutes are coloured or specially marked, as divers will strictly adhere to a 15-minute safety stop during ascent to decompress the dive. Generally, just turn the bezel during the dive, make the 0 scale on the bezel align with the minute hand, and then watch the scale on the bezel after the minute hand moves to know the time spent diving. Of course, you can also count down. First of all, know your dive time. Turn the bezel to align the minute scale with the minute hand, and then the time when the minute hand reaches the 0 scale of the bezel is 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 accounted for more, not accounted for, and to prevent delays and danger. In recent years, the 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.
Not only can provide water resistance up to 4000 meters and built-in rotating bezel, but also a powerful protective bridge is added above the crown that controls the rotating bezel at 2 o’clock.
Watch small classroom
What is diving decompression?
When we are in a high-pressure environment (above about 15 meters of water depth), gas will be dissolved in the blood due to high pressure (usually inhaled nitrogen). If we leave the high-pressure environment for a short time, the gas in the blood will be bubbled due to the release of pressure. The form dissolves blood (like when the bottle is opened with soda and bubbles popping up). At this time, people with slight nosebleeds immediately due to high blood pressure or air embolism (commonly known as diver’s disease), sore bones, and headaches. Angina pectoris, cerebral hypoxia, and even cerebral hemorrhage. To avoid this, only long-term decompression will not cause gas in the blood, so whether it is leisure or professional diving, the appropriate decompression time is absolutely important! Generally, when diving more than 15 meters, you must stay at a depth of 10 meters for about 5 minutes, so that your body gradually decompresses to be safe