Merchant Mariner Credential Verification: To verify the authenticity of a merchant mariner credential, please e-mail IASKNMC@uscg.mil . To aid in providing a faster response, please indicate ‘Credential Verification’ in the subject line of your e-mail along with mariner name(s) and mariner reference number(s) in the body of the e-mail. Note, processing times at the NMC will vary based on e-mail volume.
National Maritime Center Web-based Tools Unavailable