Question 56 RVR05 - Master of LT 100 GRT

The Correct Answer is C **Explanation for why Option C is correct:** Option C ("Immediately, when requested by a USCG boarding officer") is correct because it aligns directly with federal regulations governing credentialed mariners. Regardless of the type of vessel or its operational status (inspected or uninspected), any person acting in a capacity for which a Merchant Mariner Credential (MMC) is required must have that credential readily available on their person or onboard the vessel. US Coast Guard (USCG) boarding officers have the authority to verify the credentials of anyone operating a documented or numbered vessel, and the operator is legally obligated to produce the MMC immediately upon request. This requirement ensures that the mariner is properly licensed for the specific operation they are conducting. **Explanation for why the other options are incorrect:** * **A) An Operator of an Uninspected Passenger Vessel is not required to carry his/her MMC:** This is incorrect. If the vessel is operating as a "passenger vessel" (carrying passengers for hire), the operator is required to hold an MMC (usually an Operator of Uninspected Passenger Vessels or OUPV license, commonly called a "Six-Pack") and must carry it when acting under its authority. * **B) Only when the vessel has at least 6 passengers for hire and requested by a USCG boarding officer:** This is incorrect because the requirement to produce the MMC applies whenever the mariner is operating the vessel under the authority of the license, which starts with the first passenger for hire, not only at six. Furthermore, the MMC must be produced any time a USCG boarding officer requests it, regardless of the number of passengers onboard at that moment. * **D) Only when the vessel is involved in a marine accident:** This is incorrect. While credentials are a vital part of any marine casualty investigation, the requirement to produce the MMC exists at all times during operation and is not dependent on the occurrence of an accident.