OUPV & 100-Ton Master · Credentials & Routes
How often must a Merchant Mariner Credential officer endorsement normally be renewed?
- AEvery year
- BEvery 3 years
- CEvery 5 years✓ Correct
- DIt never expires
Explanation
MMC officer endorsements are valid for five years and must be renewed, which includes meeting recency-of-service or open-book exam requirements, a current physical, and drug-test compliance.
Authority: 46 CFR 10.227
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