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Merchant Mariner Credential

Why Choose Our MMC Service

Applying for a Merchant Mariner Credential can be slow and confusing — we make it faster and clearer.

  1. 01

    Speed

    Our established relationships with the relevant authorities help move your application faster.

  2. 02

    Simplicity

    We guide you through the process step-by-step with clear instructions.

  3. 03

    Accuracy

    We review your documents to reduce errors and avoid delays.

  4. 04

    Industry knowledge

    We've worked with global energy firms, offshore personnel, and marine contractors.

  5. 05

    Friendly Support

    Get real help from real people when you need it most.

How It Works

  1. 01

    Complete the Form

    Complete the form and finish your application in minutes. Pricing includes the total cost of application and global shipping.

  2. 02

    Review Your Details

    Check your details before submitting your application.

  3. 03

    Application Submitted

    Payment successful — your application has been submitted.

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Frequently Asked Questions about the MMC

Contact Us
What is a Merchant Mariner Credential (MMC)?

The MMC is a passport-style document issued by the U.S. Coast Guard that authorises U.S. mariners to work on commercial vessels, replacing older documents such as the Z-card, licences and endorsements.

Who needs a Merchant Mariner Credential?

Anyone who works on U.S.-flagged commercial vessels, including deck crew, engineers, officers and support personnel, must hold a valid Merchant Mariner Credential.

Where can I check the status of my MMC application?

You'll receive updates directly from our team throughout the process, from submission through approval.

How do I apply for a Merchant Mariner Credential?

Complete a short online application and upload your required documents. Our team verifies everything, prepares your submission, and manages the process until your MMC is issued.

Can foreign nationals apply for a U.S. MMC?

No, the U.S. Merchant Mariner Credential is available only to U.S. citizens or lawful permanent residents. Foreign seafarers can apply for equivalent international credentials through our Seaman's Book Service.

Can I apply for a TWIC and MMC at the same time?

Yes. Both applications can be started together, and having an active TWIC is often required before your MMC is finalised.

How long does it take to get my MMC?

The application takes only a few minutes to complete. Processing time depends on verification and approval steps but typically ranges from 2 to 4 weeks.

What documents do I need to submit with my application?

You'll need a valid passport or U.S. ID, a recent passport-style photo, a medical certificate showing fitness for duty, and proof of training or qualifications relevant to your position.

Do I need sea time to apply?

Entry-level applicants don't need prior sea time. Experienced or licensed positions require documented sea service, which our team can help you organise and verify.

How long is the MMC valid for?

The Merchant Mariner Credential is valid for five years from the date of issue and can be renewed before expiry.

Request a Customised Quote

Why wait? Get in touch with a member of our team to learn more or get a custom quote.

Phone
+1 832 252 1522 / +44 (0)28 9072 6037
Email
support@seamansbookservice.com
Address
5 Merchant Sq, London, United Kingdom W2 1AY