Diving watch | shop sites
The large majority of moderately priced and costlier watches manufactured today maintain a point of water resistance rating. The water resistance rating is decided by the gaskets that form a watertight seal between the rear and case of the watch, the sort of sealant wont to secure the crystal to the case and therefore the material from which the case is manufactured.
Diving watch | shop sites
The world organization for Standardization (ISO) has created standards by which the water resistance is rated consistent with the depth and activities that a specific watch could also be suited. They also prohibit classification of a watch as "waterproof", a typical adopted by most countries.
ISO 2281 Standard
The tests defined by the ISO 2281 standard are insufficient to qualify a watch as suitable for skin diving or saturation diving (mixed-gas). Watches meeting the ISO 2281 standard are suitable for each day wear and carry a water resistance rating for exercising and surface swimming. albeit they'll be worn under different temperature and pressure conditions, they are doing not qualify to be used for skin diving .
ISO 6425 Standard
The tests defined by the ISO 6425 standard are wont to determine the rating as a dive watch. All watches must be tested in static (still) water at 125% of the rated water resistance. A watch with a water resistance rating of 200 meters must be water-resistant at 250 meters of static water when stationary. Testing under the ISO 6425 standards are fundamentally different than tests required by ISO 2281. Every watch must be fully tested and meet a minimum rating of 100 meters.
ISO 6425 also establishes eight minimum requirements for mechanical dive watches suitable for skin diving and two additional requirements for mixed-gas saturation diving. Quartz and digital watches have slightly different readability requirements.
Ratings and Activity Suitability
The water resistance ratings and activities that they're suited are listed below: a. 30 - 50 Meters - Washing, showering and lightweight swimming b. 100 Meters - Swimming, sailing, snorkeling and recreational surfing c. 200 Meters - Serious surface water sports, professional marine activity and skin diving at depths not requiring helium gas. d. 300 Meters - Saturation diving (helium enriched environment). Watches qualified for helium mixed-gas diving have additional identifying markings.
Some watch manufacturers' measure depth in feet, atmospheres (ATM's) and bars instead of meters. Feet and meters measure the depth to which a watch could also be submerged safely. Bars and ATM's measure the static water pressure during which a watch could also be submerged.