What Is the Purpose of a Dive Watch's Rotating Bezel?

　　A rotating bezel can be considered an essential tool for a dive watch, yet few people truly understand its purpose. If you want to know what a dive watch's rotating bezel is used for, follow along with Xiaoya to find out.

　　The Function of the Rotating Bezel

　　The scale markings on a rotating bezel are 15, 30, and 45, because standard diving oxygen tanks generally last for only 45 minutes (though some bezels are marked with a 60-minute scale). The first 15 minutes are coloured or specially marked, as divers strictly adhere to making a 15-minute safety stop for decompression during ascent. Typically, you simply rotate the bezel during a dive to align the 0 mark on the bezel with the minute hand; looking at the corresponding scale on the bezel as the minute hand moves then indicates the elapsed dive time.

　　Additionally, the rotating bezel can be used for countdowns. First, know your planned dive time, then turn the bezel to align its minute mark with the minute hand. The time when the minute hand reaches the 0 mark on the bezel corresponds precisely to your dive limit time.

　　The external rotating bezel is designed to turn in a unidirectional anti-clockwise direction. This ensures that time calculations are only over-reported rather than under-reported, avoiding potential hazards caused by time delays. In contrast, the internal timing bezels that have emerged in recent years do not have a fixed rotation direction, as the bezel crown must be locked before going underwater.

　　Having read about the functions of a rotating bezel above, if you are interested in dive watches, take a look at the top-tier replica dive watches recommended by Xiaoya below.

　　Tudor Heritage Black Bay Series Blue 79220B

　　One-to-one perfect craftsmanship, blue bezel model with leather strap

　　Movement: Replica ETA2824 movement

　　Strap: calfskin strap

　　Case: Stainless steel

　　Clasp: Folding clasp

　　Water resistance: 100 metres

　　Review:

　　ZF one-to-one perfect edition, popular Tudor watch model.

　　2824 engine-turned and polished, accurate timekeeping, offering a 38-hour power reserve.

　　◆ Domed sapphire crystal, blue alloy rotating bezel, comfortable leather strap, very close to the original.

　　◆ Features a water resistance depth of 100 metres, offering outstanding waterproof performance.

　　The rotating bezel is a highly practical feature on a diving watch. If you also like diving watches, you might want to take a look at the models introduced above, which offer excellent water resistance.

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