What defines a “dive watch?” If you look for the most literal interpretation, you’re likely to find ISO 6425, which outlines a strict set of internationally defined guidelines for functionality, durability, and legibility, ultimately governing what can and cannot be officially referred to as a true “dive watch.” Along those same lines but for aviator watches, Sinn has just announced the introduction of DIN 8330 – a new German industry standard spearheaded by the watchmaker, and anchored by a trio of new pilot watches, purpose-built and officially certified to be functionally safe and reliable in the cockpit. Debuting the certification are the Sinn 103 Ti IFR, Sinn 103 Ti UTC IFR, and the Sinn 857 UTC VFR watches.

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https://www.ablogtowatch.com/sinn-din-8330-certified-aviator-watches/