Mariner Credentialing

9/19/2017: Temporary closure of Monitoring Unit San Juan, Puerto Rico

Monitoring Unit (MU) San Juan will be closed until further notice in preparation for Hurricane Maria. Regional Exam Center (REC) and Monitoring Unit (MU) location information can be found on the REC page of the National Maritime Center (NMC) website. Do not fax or mail applications to this MU. While electronic applications are still being accepted, paper applications should be sent to another REC for processing. The NMC will continue to work applications submitted prior to Tuesday, September 19.

If you recently mailed or faxed an application to MU San Juan, you may contact the NMC at the number below to verify it has been received. Mariners seeking to schedule application and examination appointments during the closure should contact the NMC via the Online Chat system, by calling 1-888-IASKNMC (427-5662), or by e-mailing

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 source documents, such as the Federal Register, Homeport and the Code of Federal Regulations. These documents remain the official source for regulatory information published by the Coast Guard.

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