This is a world first for a light-powered watch. Stainless steel case compliment the ocean blue polyurethane strap and blue dial with blue and red bezel. We exhaustively performance-tested every aspect of the Eco-Drive Professional Diver 1000m-its structure, materials, assembly technique and so on-to achieve both water resistance and helium resistance (mixed-gas resistance) at a depth of 1,000 metres. An iconic name with a reinvented construction, the Citizen Promaster Aqualand ISO compliant watch with maximum depth memory, rapid ascent alarm, auto start dive mode and power reserve indicator with divers 200M, you won't want anything else when headed to the ocean. ![]() The innovation began in 1959, with the introduction of the Parawater model. The watch must be sealed to keep helium penetration to a minimum. Introducing Promaster Dive Automatic A Depth of Offerings PROMASTER DIVE: A DEEP HISTORY Much like the sea, our storied Promaster Dive Automatic line is powered by motion, so you’ll never need a battery. See more How do I set my watch I know my model number If you know your model number, go to and search or browse for your. To obtain the instructions specific to your watch, you will need to provide the Move. The helium then drives up the interior pressure of the case, risking damage to the glass and to the movement. Setting instructions can be accessed through our website and our My Citizen App (available for iOS and Android). Helium gas molecules are so small that they can easily penetrate the inside of a water-resistant watch. Helium is the greatest obstacle when designing a light-powered watch for saturation diving environments. ![]() Professional saturation divers can spend several weeks living in the pressured capsule. The capsule is lowered deep into the sea and the divers, dressed in atmospheric diving suits, conduct operations with the capsule serving as their base. This is the standard license most citizens receive when they apply for a license. Going into a large high-pressure tank on the surface, the divers absorb a mixture of oxygen and helium until their bodies are “saturated” with the two gases they then transfer to a capsule. the ProMaster is an excellent choice for expedited freight shipping. Saturation diving is a special type of diving that enables divers to conduct long-term operations at depths where air diving (scuba etc.) is no longer possible.
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