Question 55 RVR05 - Master of LT 100 GRT

The Correct Answer is B **Explanation for Option B (5 years):** The standard period of validity for a U.S. Merchant Mariner Credential (MMC), issued by the U.S. Coast Guard (USCG), is typically five (5) years from the date of issuance. Mariners must apply for renewal before the expiration date to maintain their status and legal ability to serve aboard U.S. flagged vessels. **Explanation for Incorrect Options:** * **A) 1 year:** This is incorrect. A one-year period is too short for a standard credential and is usually associated with temporary or restricted endorsements (like a Temporary Certificate of Documentation for a vessel, or certain medical certifications). * **C) 3 years:** This is incorrect. While some maritime-related documents or courses (such as STCW Basic Training endorsements or medical certificates) may be valid for three years, the core MMC itself is valid for five years. * **D) 2 years:** This is incorrect. A two-year validity period does not align with the current regulations set forth by the USCG for the Merchant Mariner Credential.