OUPV & 100-Ton Master · Credentials — Renewal Grace Period
A Merchant Mariner Credential is valid for five years. To keep operating, the holder should:
- ANever renew once issued
- BOperate indefinitely after it expires
- CRenew only every 20 years
- DRenew before expiration, meeting recency/professional and medical requirements; operating on an expired credential is not allowed✓ Correct
Explanation
An MMC is issued for five years and must be renewed by meeting the renewal requirements (recency or an open-book test, and a current medical certificate). A mariner may not exercise the authority of an expired credential; renewal should be completed before the expiration date.
Authority: 46 CFR Part 10
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