Certification: National Mate Unlimited GL and Inland

100 Forbes Drive Martinsburg, WV 25404-7120

Mate of Unlimited GRT upon Great Lakes and Inland Waters. This is an advanced-level merchant mariner credential. The general requirements for this credential are TWIC Card (Identification, Fingerprints, Citizenship, Social Security number, etc), CG-719B Application, NDR Consent & Check, Oath, 3 letters of recommendation, photograph (supplied by TSA), SSEB Screening complete, age of 21 or over, CG-719K Physical Exam, Medical Tab in MMLD, Drug Testing Compliance, Mariner Fees, and Sea Service Letters or Discharges. Sea service requirements include recency- 90 days in the past 3 years on vessels, 1080 days of deck service on steam or motor vessels, of which 90 days of service on vessels on Inland waters, and 180 days of service as AB, INL Mate, Boatswain, Wheelsman, Quartermaster of equivalent position; or graduation from the deck class of the Great Lakes Maritime Academy; or 360 days of service as master on vessels over 200 GRT while holding an Officer rating as Master 1600 GRT GL & INL. There are also tonnage requirements. Other requirements include a First Aid course, CPR course, approved firefighting courses (Basic & Advanced). All candidates must complete an examination.

More than two years of education or training after high school required?
More than two years of work experience required?
Oral or Written Exam Required?
Renewal Required?
Every 5 Year(s)
Renew through Continuing Educational Units(CEU)?
Renew through Re-Examination?
Renew through Continuing Professional Development(CPD)?
Does applicant have choice of at least two options from above for renewal (CEU, CPD, or exam)?


Your local Regional Exam Centers external site(REC) provide valuable resources toward obtaining a Merchant Mariner Credential (MMC).


The certification has an education level of an Associates of Arts or Associates of Sciences degree or higher and has a work experience requirement of more than 2 years, or requires obtaining a ‘core’ level certification from the same organization.

  • This certification is related to military occupational specialties.