‘Dives are run un­til the last minute’

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As a commercial diver oper­at­ing at great depths on oil rigs, Ro­man Frischknecht re­lies on rather more than a wrist­watch to keep charge of dive times. “It is the su­per­vi­sor’s job to mon­i­tor times,” he ex­plains. “I like to wear an Oris dive watch when work­ing on deck and mon­i­tor­ing other divers. Al­though we use dig­i­tal depth gauges in commercial and recre­ational div­ing, me­chan­i­cal watches can be more re­li­able in my eyes.”

Such is Frischknecht’s ex­pe­ri­ence as a deep-sea diver in ex­treme con­di­tions The 51mm size could make this an un­likely ev­ery­day piece, but a light­weight ti­ta­nium case of­fers more ver­sa­til­ity than one might ex­pect. The bezel is se­cured by the Ro­ta­tional Safety Sys­tem Frischknecht helped develop: a hall­mark of the ProDiver range.

Spe­cial fea­tures

RSS bezel­lock­ing sys­tem

Helium es­cape valve

1,000m depth rat­ing that Oris, a watch­maker spe­cial­is­ing in hard­core div­ing watches, tapped into his knowl­edge to cre­ate some spe­cial fea­tures for its ProDiver range. He was in­volved in de­vis­ing the Ro­ta­tional Safety Sys­tem, Oris’s rev­o­lu­tion­ary de­sign for en­sur­ing the watch’s uni-di­rec­tional bezel is locked se­curely in place. “The RSS bezel is easy to han­dle even when wear­ing thick Neo­prene gloves,” he says. “Great if you’re go­ing div­ing in cold wa­ters. It locks The X Fath­oms is the all-singing, all-danc­ing flag­ship of Blanc­pain’s Fifty Fath­oms col­lec­tion, which is de­scended from the time­piece that an­nounced the birth of the mod­ern dive watch in 1954.

With a dial that is a mys­ti­fy­ing ar­ray of colour­ful in­di­ca­tions, it’s more ma­chine than watch, though one steeped in dive- watch lore.

Spe­cial fea­tures

Me­chan­i­cal depth gauge, with depth in­di­ca­tion in me­tres and feet

Max­i­mum depth mem­ory sys­tem

Ret­ro­grade fiveminute counter and can’t be moved ac­ci­dently.”

Frischknecht was in­stru­men­tal, too, in the devel­op­ment of the tidal range indicator on the ProDiver Pointer Moon, which in­forms divers about the phases of the moon and whether to ex­pect stronger or weaker cur­rents – par­tic­u­larly use­ful when div­ing in tidal wa­ters, notes Frischknecht.

Tim­ing is crit­i­cal dur­ing sat­u­ra­tion dives on sub­merged struc­tures such as well­heads and plat­form bases, for

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