Certificate expiry planner

Explanation Marine Deep's explanation, not a requirement.

Adds whole months to the issue date, keeping the day of the month (or the last day of a shorter month). The validity period comes from you, from the certificate itself: the tool does not assume any legal validity period. For a whole team, use the certificate and medical tracker.

Explanation Marine Deep's explanation, not a requirement.

Not a dive planning tool. This calculator does arithmetic only. It does not plan dives, compute decompression, no-stop limits, gas endurance or maximum operating depths, and it does not check anything against any rule or limit. Use your company's procedures, approved tables and the applicable regulations for all of those.