My water resistant formula

[leopardprey]

Reading up on watches water resistant ratings and what it all entails. One of the things that is recommeded is to have your watch water pressure tested every year to insure water resitance. Also how over time the gaskets/seals can become weaker and thus decrease the depth rating (that is why ROlex recommmneds servicing every 5 years). Reading that a watch can loose up to 60% of it's water depth rating over the years. Also watches are tested for waterproofness in a static position. Underwater activities such as Swimming, Diving, hitting object underwater can created additional pressure and stress of the watch underwater.

So here is my "Safe and Practical" easy forumula for a watches true water proofness. Convert the Meter depth rating to Feet.

So, for example a GMT is water resistant to 100 meters. So in reality I calculate that in feet instead. So that is 100 Feet. That accounts for pressure increases from swimming, 60% reduction from wear and tear, etc..

That means a Sub at 300 Meters would actually be good for diving to 300 feet.

Now that works out fine, as most of my recreational dives and most military deployment dives are only 30-60 feet deep. When I used to dive, deepest I went was about 150 feets. Anything over 90 feet is considered deep diving and decompression stops may have to be used.

Swimming accounts for only about 1-2 meters deep.

Now of course the watch may go deeper than that, but that is how I keep it safe. IF I am going to go diving deeper than 90 feet, I will wear my Sub instead of my GMT or IWC.

[davor]

Originally Posted by leopardprey

Reading up on watches water resistant ratings and what it all entails. One of the things that is recommeded is to have your watch water pressure tested every year to insure water resitance. Also how over time the gaskets/seals can become weaker and thus decrease the depth rating (that is why ROlex recommmneds servicing every 5 years). Reading that a watch can loose up to 60% of it's water depth rating over the years. Also watches are tested for waterproofness in a static position. Underwater activities such as Swimming, Diving, hitting object underwater can created additional pressure and stress of the watch underwater.

So here is my "Safe and Practical" easy forumula for a watches true water proofness. Convert the Meter depth rating to Feet.

So, for example a GMT is water resistant to 100 meters. So in reality I calculate that in feet instead. So that is 100 Feet. That accounts for pressure increases from swimming, 60% reduction from wear and tear, etc..

That means a Sub at 300 Meters would actually be good for diving to 300 feet.

Now that works out fine, as most of my recreational dives and most military deployment dives are only 30-60 feet deep. When I used to dive, deepest I went was about 150 feets. Anything over 90 feet is considered deep diving and decompression stops may have to be used.

Swimming accounts for only about 1-2 meters deep.

Now of course the watch may go deeper than that, but that is how I keep it safe. IF I am going to go diving deeper than 90 feet, I will wear my Sub instead of my GMT or IWC.

ok but can u please tell me how much is 300feet in meters...

[Incurable]

Well, there's 3.28 feet in a meter so.... 300/3.28 would get you around 91.48 ft. I think it's important to mention that no watch maker that I know of uses the verbiage "waterproof". They use things like "water resistant" or "pressure proof". In legalese, that translates into, "if your watch floods, it's always your fault"...