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Because of military needs, diving Replica Cartier Men's Roadster Watches were invented. Also they were invented for people who dive for a living. Technomarine watches are used in this manner.Divers have to be able to handle any situation on his or her own. Diving watches can resist water up to three hundred meters or nine hundred feet. The watch equipment used has to be reliable. The fact that danger is afoot makes it clear that to wonder if one watch is working properly is to endanger lives. There should be no question as to the reliability of a diver watch.All of the diving watches sold should pass test standards. These watches get to call themselves diver watches which distinguishes them from other watches that can be used in the water. Watches without this distinguishing mark are not suitable for scuba diving activities. Using them underwater may break them.Professional ocean work calls for a dependable watch that wont break under water pressure. Even though divers now look to electronic diving equipment, diving watches are used for back up. They were invented in the sixties.The International Organization for Standardization creates tests for diving watches. Diving watches are rated in this manner. If they dont have the rating, they may break under water pressure.The watch cases of diving watches must be water resistant and be able to endure the harshness of seawater. The cases are generally made out of corrosion resistant materials.Replica Cartier Men's Roadster Watches The watch case must also provide an adequate degree of protection against magnetic fields and shocks.Dress watches are not diving men wrist watches because dress watches cannot stand up to salty sea water. The pressure of deep sea diving is hard work and the watch has to be made to withstand it. Plastic, resins and ceramics are also used for watch casings.Divers use their watches to know how long to stay underwater. It is for this reason the bezel rotates on diving watches. The watches also have thicker crystals and are sometimes domed Replica Cartier Men's Roadster Watches.