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Merchant mariner credential application processing time update and important additional information

From Captain Bradley W. Clare, National Maritime Center Commanding Officer

The National Maritime Center (NMC) continues to experience increased Merchant Mariner Credential (MMC) and medical certificate application processing times. Every effort is being made to reduce these times and return credential delivery to within our stated performance goals.

Below are important things YOU can do to streamline application processing:

Expiration Date Reminder:

  1. October 31, 2021, OR
  2. One year after the initial expiration date of the credential (i.e., 1 year after the expiration date printed on the credential).

Don’t wait until the last minute! Despite the extensions provided via Marine Safety Information Bulletin 08-20, you should submit your application once you have met the requirements. Remember, an MMC can be renewed at any time and may be post-dated up to 8 months.

The NMC Customer Service Center is available from 8:00 a.m. to 4:30 p.m. EST, Monday through Friday for your questions. Mariners may reach our call center at 1-888-IASKNMC (427-5662) and

This blog is not a replacement or substitute for the formal posting of regulations and updates or existing processes for receiving formal feedback of the same. Links provided on this blog will direct the reader to official publications, such as the Federal Register, Homeport and the Code of Federal Regulations. These publications remain the official source for regulatory information published by the Coast Guard.

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