Merchant Mariner Credentials (MMC) Issued

New Merchant Mariner Credentials: Your Comprehensive Guide

On March 1, 2024, the United States Coast Guard began issuing the Merchant Mariner Credentials (MMCs) in a new format; replacing the existing passport-style red book and endorsement labels. 

What do the new Merchant Mariner Credentials look like?

The new MMCs differ from the legacy passport style. To get a visual, refer to the provided example: 

When did the circulation of these new Merchant Mariner Credentials (MMCs) begin?

On March 1, 2024, the new credentials were issued for all approved applications, including credential endorsements.

What steps do I need to take upon receiving my new MMC?

Follow these essential steps to ensure the validity and security of your credentials: 

1. Verify
   1. Review the document for accuracy
   2. Report any errors to the National Maritime Center immediately
2. Sign
   1. You MUST sign your credentials with a black or blue ballpoint pen to make them valid
   2. DO NOT use permanent marker or gel-type pens 
3. Protect 
   1. MMCs cannot be used as a passport
   2. DO NOT laminate your credentials 
4. Secure
   1. Avoid any attempt to modify the document

How should I fold the new Merchant Mariner Credentials?

The MMCs can be displayed either flat or folded. Folding is optional; not required. 

If you choose to fold, follow the provided guidelines: 

What happens if I have a legacy credential?

Legacy credentials remain valid until the indicated expiration date.

Use the MMLD Credential Verification tool on uscg.mil to confirm the validity of your credential.

How does adding an endorsement to an existing license work with the new MMCs?

Endorsements will no longer be provided as separate labels (ex., stickers); instead, a new MMC document inclusive of endorsements will be issued.

What are the dimensions of the new Merchant Mariner Credentials?

The new MMCs are formatted on 8.5" by 11" waterproof and tear-resistant synthetic paper.

What security features do the MMCs have?

The updated credentials boast several security features, including micro-printing, foiling, and intricate patterns.

Do I need to take a photo for my Merchant Mariner Credentials?

The National Maritime Center will use your photo from the Transportation Worker Identification Credential (TWIC) card for your MMC. 

Where can I find more information?

Explore the MMC Brochure or refer to the official announcement by clicking on the provided links for a deeper understanding of the new credentials.

How can I check the status of my active license or someone else's? 

You can verify the validity of a United States Merchant Mariner Credential (MMC) and Medical Certificate using the U.S. Coast Guard Merchant Mariner Credential Verification tool. This tool is designed for Port State Control Officers, employers, and others who need to confirm credential status. It displays only the most recently issued valid MMC and Medical Certificate, with data updated daily at 0700.

Medical Certificates display both the issue and expiration dates for service. Mariners must hold a valid Medical Certificate to sail under the authority of their MMC. All credentialed U.S. Mariners are required to carry both their MMC and Medical Certificate when sailing.

To verify credentials, you will need to enter the document number, credential type, reference number, and the mariner’s last name. Employers are strongly advised to visually inspect original credentials in addition to using the verification tool to confirm authenticity.

If you have any questions or concerns about the verification results, contact the National Maritime Center.