Master of Unlimited Tonnage 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. Great Lakes, 360 days of service as Mate or FCP while acting in the capacity of 1st Mate of GL vessels over 1600 GRT; or 720 days of service as Master INL vessels over 1600 GRT; or 360 days of service upon GL while holding an Officer endorsement as Mate or FCP of GL & INL of vessels over 1600 GRT, of which: 180 days of service as 1st Mate, and Service as 2nd Mate accepted: 2 for 1; for a maximum of 180 days. Inland, 360 days service as FCP (other than canal & small lakes routes) or Mate of GL or INL steam/motor vessels over 1600 GRT; or 720 days of service as Wheelsman or QM while holding a Mate or FCP endorsement. There are also tonnage requirements. Other requirements include completing a First Aid course, CPR course, and approved basic & advanced firefighting courses. All candidates must complete an examination.
