Dive Watch Safety Checker
Last updated: April 2026 · 4 min read
Pick your watch's water resistance rating and the type of diving you plan to do. The tool confirms whether the combination is within manufacturer and ISO 6425 guidelines.
Depth Safety Check
Guidance based on manufacturer convention and ISO 6425. Does not replace certified dive safety training or equipment checks.
Why "200m" alone isn't enough for diving
A water resistance rating is a static laboratory number. A dive watch has to survive dynamic conditions: currents, thermoclines, tank pressure near the face, and repeated trips from 30 °C surface to 10 °C depth. ISO 6425 is the standard that covers that gap.
Look for these on the dial of a true dive watch:
- The word Diver's next to the depth (e.g. "Diver's 300m")
- A unidirectional bezel with 15/30/45-minute markers
- A visible running seconds (pip at 12 o'clock on the bezel, plus lumed second hand)
- Luminous material that remains readable after dark adaptation
Buying a used dive watch?
The rating printed on the dial means nothing on a counterfeit or a tampered case. Authenticate the watch before trusting its depth.
Authenticate with photos