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2. Invicta Watch Group - Wikipedia

   en.wikipedia.org/wiki/Invicta_Watch_Group

   Invicta produces some of its lineup in Switzerland—those models are signed "Swiss Made" on the watch face and specified in the website description for the models. [8] In November 2012, Invicta announced a line of watches endorsed and designed by Pro Football Hall of Fame NFL player Jason Taylor. [9]

3. Diving watch - Wikipedia

   en.wikipedia.org/wiki/Diving_watch

   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 ...

4. Southern African Underwater and Hyperbaric Medical ...

   en.wikipedia.org/wiki/Southern_African...

   SAUHMA is the accreditation agency for facilities for hyperbaric medicine in South Africa, and for the personnel operating such facilities. [3] [4]It is also the designated agency to provide the national on-line database of all registered designated medical practitioners licensed to perform medical examinations of fitness to dive for commercial divers in South Africa, and of the results of all ...

5. Water Resistant mark - Wikipedia

   en.wikipedia.org/wiki/Water_Resistant_mark

   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 ...

6. List of watch manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_watch_manufacturers

   This list is a duplicate of Category:Watch brands, which will likely be more up-to-date and complete. Manufacturers that are named after the founder are sorted by surname. Manufacturers that are named after the founder are sorted by surname.

7. Helium release valve - Wikipedia

   en.wikipedia.org/wiki/Helium_release_valve

   When saturation divers operate at great depths, they live under pressure in a saturation habitat with an atmosphere containing helium or hydrogen.Since helium atoms are the smallest natural gas particles—the atomic radius of a helium atom is 0.49 angstrom and that of a water molecule is about 2.75 angstrom—, they are able to diffuse over about five days into the watch, past the seals which ...