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A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...
The 7878 caliber Eco-Drive movement used in this watch can run for up to 180 days on its secondary power cell. Four solar cell segments are just visible under the dial. Citizen Attesa Eco-Drive ATV53-3023 analog-digital chronograph with 4 area Radio Controlled reception (North America, Europe, China, Japan). Manufactured in 2010.
Citizen Promaster Automatic NY0040-09EE diving watch. In 1959, Citizen launched the Parawater – Japan's first fully-waterproof wristwatch. It became the forerunner to Citizen's range of dive watches, subsequently (1982) called the Promaster Marine range. Also in 1982, Citizen launched the 1300m Professional Diver's watch – the world's most ...
The test for qualifying a diving watch to bear the word "diver's" on the dial is for repeated usage in a given depth and includes safety margins to take factors into account like aging of the seals, the properties of water and seawater, rapidly changing water pressure and temperature, as well as dynamic mechanical stresses encountered by a ...
Citizen Atessa Eco-Drive ATV53-3023 analog-digital chronograph with 4 area Radio Controlled reception (North America, Europe, China, Japan) A chronograph is a specific type of watch that is used as a stopwatch combined with a display watch. A basic chronograph has hour and minute hands on the main dial to tell the time, a small seconds hand to ...
A dive computer, personal decompression computer or decompression meter is a device used by an underwater diver to measure the elapsed time and depth during a dive and use this data to calculate and display an ascent profile which, according to the programmed decompression algorithm, will give a low risk of decompression sickness.
In 1996, Citizen started to sell analog light-powered watches under the Eco-Drive name. [2] Since their introduction, photovoltaic devices have greatly improved their efficiency and thereby their capacity. Watchmakers have developed their technology such that solar-powered watches had by 2009 become a major part of their range. [3]
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