No, no ha dicho eso.....por lo contrario....la palabra "professional" la pueden colgar hasta en una falsificación, ó en uno Alpha ó Parnis(con lo mayor respecho por esas marcas), además puede ser un pilot profesional ....
Lo G-Shock no es un diver profesional, tenga "air divers", "profesional", ó lo que seya....
Como dices que un Longines no es un diver certificado?
Lo Hydro es tan certificado cuanto un Rolex Sub ó un Omega Seamaster, no?
Aguanta lo mismo, y en la verdad sus 300m son tan fiables cuanto de los de un Rolex ó Omega(no hablo de sus mecanismos y calidad y las otras cosas esas)
The standards for diving watches are regulated by the ISO 6425 international standard. The watches are tested in static or still water under 125% of the rated (water)pressure, thus a watch with a 200 meter rating will be water resistant if it is stationary and under 250 meters of static water. The testing of the water resistance is fundamentally different from non-dive watches, because every watch has to be fully tested.
ISO 6425 water resistance testing of a diver's watch consists of:
- Immersion of the watch in 30 cm of water for 50 hours.
- Immersion of the watch in water under 125% of the rated pressure with a force of 5 N perpendicular to the crown and pusher buttons (if any) for 10 minutes.
- Immersion of the watch in 30 cm of water at the following temperatures for 5 minutes each, 40°C, 5°C and 40°C again, with the transition between temperatures not to exceed 1 minute. No evidence of water intrusion or condensation is allowed.
- Immersion of the watch in a suitable pressure vessel and subjecting it to 125% of the rated pressure for 2 hours. The pressure must be applied within 1 minute. Subsequently the overpressure shall be reduced to 0.3 bar within 1 minute and maintained at this pressure for 1 hour. No evidence of water intrusion or condensation is allowed.
- For mixed-gas diving the watch has to be immersed in a suitable pressure vessel and subjecting it to 125% of the rated pressure for 15 days in a (helium enriched) breathing gas mix. Subsequently the overpressure shall be reduced to normal pressure within 3 minutes. No evidence of water intrusion, condensation or problems caused by internal overpressure are allowed.
- An optional test originating from the ISO 2281 tests (but not required for obtaining ISO 6425 approval) is exposing the watch to an overpressure of 2 bar, no more than 50 µg/min of air is allowed to get inside the case.