OUPV & 100-Ton Master · Credentials
A merchant mariner credential is generally valid for a period of, and must be renewed every:
- A3 years
- B5 years✓ Correct
- C10 years
- DIt never expires
Explanation
An MMC is valid for five years and must be renewed before expiration, with renewal requirements including a current medical certificate and, for many endorsements, evidence of recent sea service or an approved refresher.
Authority: 46 CFR Part 10
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