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Citizen Watch Co., Ltd. (シチズン時計株式会社, Shichizun tokei Kabushiki-gaisha), also known as the Citizen Group, is an electronics company primarily known for its watches and is the core company of a Japanese global corporate group based in Nishitokyo, Tokyo, Japan.
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 ...
In 2012 Citizen announced the Eco-Drive RING Concept Model. This watch features a ring-shaped solar cell surrounding the watch case sidewall. [13] [14] In 2018 Citizen announced it developed the Caliber 0100 Eco-Drive prototype autonomous high-accuracy quartz watch movement which is claimed to be accurate to ± 1 second per year. [15]
The standards and features for diving watches are regulated by the ISO 6425 – Divers' watches international standard. [2] This standard was introduced in 1996. ISO 6425 defines such watches as: A watch designed to withstand diving in water at depths of at least 100 m and possessing a system to control the time.
Brashear enlisted in the United States Navy on 25 February 1948, four months before the military was desegregated by President Harry S. Truman. [3] He graduated from the United States Navy Diving & Salvage School in 1954, becoming the first African-American to attend and graduate from the Diving & Salvage School and one of the first African-American United States Navy Divers.
She started training as a dive instructor and working with sharks in 1995. [5] The same year, she began working for Underwater Explorer's Society (UNEXSO). Later, she became both a PADI Course Director and NSS-CDS Cave Diving Instructor. [6] Zenato's cave diving projects have included remapping the underwater caves in the Lucayan National Park. [7]
In 1957, the US Army switched to shined black combat boots, although the transition to black boots was not completed until late in the Vietnam War, which also saw the introduction of the jungle boot. [3] [29] [30] Both of these boots had a direct molded sole. [31] The jungle boot had a black leather lower and an olive drab canvas (later nylon ...
The Newtsuit has fully articulated, rotary joints in the arms and legs. These provide high mobility, while remaining largely unaffected by high pressures. An atmospheric diving suit (ADS), or single atmosphere diving suit is a small one-person articulated submersible which resembles a suit of armour, with elaborate pressure joints to allow articulation while maintaining an internal pressure of ...