Rolex introduced this year on the occasion of the fair of Basel 2014 a new version of its famous Sea-Dweller (still sealed to 1,220 metres) which is equipped with the latest innovation of the Genevan brand standards. Of course, its famous helium (invention Rolex) valve located on the left side of the box is still there! A great return, as unexpected as unexpected by all professional divers. And lovers of sport watches.

The Sea-Dweller (ref 16.600) had disappeared from the Rolex catalog in 2008 when the Genevan brand had released his Deep-Sea model. Big sort of "maxi" Sea-Dweller. For everyone, the Sea-Dweller was thus permanently stopped. And no one expected to see it re-emerge from the abyssal depths of the ocean; its preferred habitat!

Rolex so surprised everyone by revealing this year, seven years after his death, a new version of this icon shows that since its inception in 1967, has always had its fans. "Divers" enthusiasts who have always preferred the Sea-Dweller to the Rolex Replica Submariner because she was slightly thicker, it was not equipped with the famous magnifying glass, and it was equipped with the famous helium escape valve. In short, a watch very similar to others but different and especially differentiating (for sophisticated connoisseurs), which was originally, like all professional Rolex, for professionals. In this case, those large funds...

This new version (ref 116600) should attract fans of this model since it truly retains the same design and same specificities. But better! Housing was slightly reworked (a little bit more solid; 40 mm), the bezel is of course ceramic Cerachrom, bracelet is ultra-technical and size benefits from the latest innovations of the mark to the Crown. Certainly, its price is high with 8,400 euros, but if a single sport Rolex to need in your collection, this is it!

Take advantage of the return of the Sea-Dweller to return to more details on the (relatively unknown) history of this real diving instrument marketed by Rolex in 1967 to respond to the needs of the professional divers who descended to the deepest time...

When the mission Hydra VIII of the Comex (Compagnie Maritime of expertise) set the record for the world of diving in the sea at least 534 meters in 1988, the watch of the mission is a Sea-Dweller. The standard model in the equipment of the world leader in underwater engineering which is distinguished by a white logo "Comex" placed on the dial; a much sought after watch that highs in sales at auctions. And the only instrument whereby elite divers fully trust to accompany them in their saturation Ultra-Deepwater descents, where the precise timing of each step is of vital importance. The watch with which they have carried out thousands of underwater missions in extreme conditions.

Designed in 1967, waterproof up to 610 meters and then up to 1,220 meters since 1978, the Sea-Dweller is the watch of the pioneers of the depths. Those who were known as the "aquanauts", explorers of the hydrosphere, this pool area which covers approximately 70% of our planet. Like them, the Sea-Dweller had to adapt to the artificial breathing mixtures designed for large pressures, composed of light gases such as helium or hydrogen. Like them, she had to submit to the long process of decompression during ascent to the surface in order to eliminate these gases without damage - the famous and potentially fatal accident of decompression of the divers. To this end, the Sea-Dweller inaugurated in 1967 a major innovation developed and patented by Rolex: the famous helium escape valve.

This ingenious safety valve, incorporated into the watch case played a vital role in the development of diving in the deep, whose Comex is certainly the most illustrious representative. Its founder and president, the deep diving pioneer Henri Germain Delauze, said about this watch: 'a diver with hydrogen can not live without his Fake rolex watches. '' In diving, the time is a vital data. The timing of operations, change of gaseous mixtures, the duration of levels of decompression, the entry or exit of the turret are made in seconds. Have an accurate, robust and reliable watch was of paramount importance.

Then other limitations-such as the high pressure nervous syndrome caused during prolonged dives to more than 150 metres below-heliox, by using different gas cocktails composed to varying degrees of hydrogen, oxygen, helium or nitrogen. The combination of gaseous mixtures specific at certain stages of the dive allows from the beginning of the 1960s to push still further the depths reached and optimize the decompression time. In 1961, a dive in open water occurs at –222 meters in Lake Maggiore, Switzerland. The following year, it reached - 313 meters in the Pacific ocean in California. A record that surprises then the entire community the time divers and foreshadows new underwater horizons.

The depth is not the single aspiration of the conquest of the underwater world: the idea of staying for a long period under water, power or even to live the sea, has also fueled long-standing the human imagination. Projects of houses under the sea launched in the 1960s in France and the United States will help to overcome the second constraint of underwater exploration: the decompression. Incidentally, these programs echo on behalf of dive designed by Rolex watch during this time: the Sea-Dweller, literally 'living seas"in English.

Major problem of diving, decompression limit exponentially useful time under water with depth and duration. For example, for about 15 minutes passed to –90 metres, a diver must perform nearly two hours of decompression to the surface unharmed. Ten minutes to –300 metres, and it is theoretically more than twenty hours of decompression needed. Just a few minutes or a few additional metres still increase this period consistently.

The problem is also physiological and is called decompression sickness, a condition that can lead to paralysis, or even death. It is due to the fact that with underwater pressure, the human body turns into 'bottle of carbonated water': gases under pressure dissolving in water, and the human body is composed of water to nearly 65%, a portion of the inhaled gas is diluted in the blood and tissues. A facelift without decompression returns to very strong shake the bottle and open it at a glance: the released gas forms bubbles explosively. In human tissues, these bubbles can result in serious injury. To eliminate the gas safely, should be very slightly, slowly open the bottle and several times. It is the purpose of levels of decompression, allowing the body to remove dissolved gases in a controlled manner.

In the mid-1950s, a crucial discovery contributes decisively to the deep dive and long-term development. Experiments demonstrate that human tissues have a given capacity of absorption of gases under pressure. This means that starting from a threshold of saturation of the body in breathing gas, the duration of decompression remains even if a diver remains under water a few hours or several days, weeks, or even months. Only the depth and type of breathing gas proved decisive for decompression. This discovery allows the development of "diving in saturation", a technique that involves literally saturate the divers and keep them in an environment under pressure for long periods, so that they can perform many deep dives should undergo only one process of decompression at the end of mission.

Between dives, they live in an underwater habitat, sort of House of the sea lying on the bottom, where reigns an air pressure equal to that of the water at this depth. Divers breathe a synthetic gas mixture helium, both during their outings than in the habitat. In 1965, an American Aquanaut stays so thirty days under the ocean, living in a habitat placed at –62 metres deep. During their stay under the sea, the aquanauts become fully acclimated to the pressure of the depths, being saturated with gas, so that they can no longer return to the surface atmospheric pressure without going through a long phase of decompression in subwoofer hy.

edit @ 9 Sep 2014 13:53:04 by kevinlynch

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