A divers watch is a special kind of sports watch that is designed for
divers who need an accurate and sophisticated timepiece that can
operate in an underwater environment. A divers watch must at a minimum
be able to withstand water pressure at 10 atmosphere units which is
equivalent to 100 meters or 330 feet, although a typical divers watch
can withstand much more than this and are usually capable of achieving
depths up to 200 meters or 660 feet, with some capable of going much,
much deeper.
The International Organization for Standardization (or ""ISO"") has
a special standard for dive watches. A certified dive watch must pass
a series of tests and possess certain qualities to be ISO-compliant. A
genuine diver's watch must pass a series of tests put forth in ISO
6425 and is is permitted to print the words ""DIVER'S"" on the case if
it qualifies. A sports watch with this marking is guaranteed to be at
least suitable for recreational diving.
A diver's watch that passes ISO 6425, has met certain requirements
such as possessing a bezel that surrounds the watch face that must
rotate unidirectionaly (if an analog watch). It must feature markings
at at least five minute intervals and a pre-select marker to denote
markings and specific minutes. The face minute markings must be clear
and easy to read and these watches must be legible at 25cm (9.84
inches) from the wearer in complete darkness. Diving watches must be
chemically resistant and must pass a test whereby the watch is
immersed in a solution for 24 hours to test for rust resistance.
Diving watches have become more standardized over time, but in the
early days were developed to meet the needs of professional and
military divers. Many believe Omega is celebrated as the worlds first
dive watch maker. The first Omega diving watch was the Omega Marine
which first entered the market in the year 1932.
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