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Merchant Mariner Credential Verification


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Merchant Mariner Credential Verification
  • This tool is intended for Port State Control Officers, employers and others who wish to verify the validity of a United States Merchant Mariner Credential.
  • EMPLOYERS: It is recommended you visually verify original credentials before offering employment based on this report.
  • There are three methodologies available, via the drop down menu below, to enter the system:
    • Enter the Serial Number and Type of the credential.
    • Enter the reference number of the mariner(s).
      • You may either enter multiple reference numbers/last names OR
      • You may enter a single reference number/last name combination
    • Enter the last name, date of birth and last 4 digits of the mariner's social security number.
      • You may either enter multiple last names, dates of birth and last 4 digits of the mariner's social security numbers OR
      • You may enter a last name, date of birth and last 4 digits of the mariner's social security number combination
  • If you have any questions or concerns about the data you receive, please contact the National Maritime Center at iasknmc@uscg.mil or 1-888-IASKNMC (domestic US calls only).
  • Additional information regarding U.S. Merchant Mariner Credentials can be found at http://www.uscg.mil/nmc/.
  • In order to legally serve under the authority of a U.S. Merchant Mariner Credential the holder must also hold a valid U.S. Transportation Worker Identification Credential.
  • Data viewed on this site is updated daily at 0700.
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