MMC Application Help
Applying for a Merchant Mariner Credential requires several forms and supporting documents. The exact requirements depend on the endorsement being requested.
Always begin with the current National Maritime Center checklist for your endorsement.
View National Maritime Center Checklists >>
Typical Application Documents
Depending on the endorsement and transaction, an application may include:
- A completed Merchant Mariner Credential application
- Proof of identity and citizenship
- A valid Transportation Worker Identification Credential or evidence of applying
- Sea-service documentation
- Coast Guard-approved course completion certificates
- Drug-testing documentation
- Medical-certificate documentation
- First Aid and CPR documentation when required
- Payment of the applicable Coast Guard fees
The National Maritime Center determines whether an applicant meets the requirements for the requested endorsement.
Application Help From MM-SEAS
MM-SEAS provides online credential-management tools that help mariners:
- Organize Merchant Mariner Credential documents
- Create and track sea-service records
- Monitor expiration dates and application deadlines
- Determine which endorsements their sea service may support
- Prepare for original applications, renewals, and upgrades
ColPac students receive complimentary access to MM-SEAS Expert through our partnership with MM-SEAS. Expert Access provides individual guidance for training, sea-service, and credential questions.
Full application preparation, document review, and submission assistance are separate services available directly from MM-SEAS.
First Aid and CPR
First Aid and CPR documentation may be required for an original deck-officer endorsement. Visit our Trusted Resources page for information about local First Aid, CPR, and AED training.
Original Applications and Renewals
This page provides general information for original credentials and new endorsements.
If you are renewing an existing Merchant Mariner Credential, visit our renewal-information page.
View MMC License Renewal Help >>
Official Coast Guard Resources
Merchant Mariner Credential Application Information >>
National Maritime Center Forms >>
National Maritime Center Checklists >>
Requirements and forms may change. Confirm all application requirements using the current National Maritime Center checklist before submitting your application.