U.S. Merchant Mariner Credential modification document upload
Official requirementAdd each required file. Conditional files are marked optional.
Requirement verified August 11, 2026 · Source: U.S. Coast Guard National Maritime Center ↗
Upload your files
Required files
CG-719B Merchant Mariner Credential application
PDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of the CG-719B into one PDF attachment. Do not submit its pages separately.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Optional or conditional files (9)
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
Merchant Mariner Credential supporting document
Only if it applies to youPDF · ≤75 MBUploadPrep prepares files up to 30.00 MB locally. Larger files that already meet this court's limit can be uploaded directly.
- Combine every page of this multi-page document into one PDF attachment.
- Do not password-protect the PDF; the Coast Guard cannot process protected documents.
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Sources disagree on this
portal migration
The Coast Guard has announced a future Navita credentialing system while the current official instructions still direct applicants to ASAP.
How we handle it: This preset follows the currently published ASAP upload rules and should be rechecked when the Coast Guard changes the application link.