Master of Unlimited Tonnage. 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 of appropriate tonnage. Master, 360 days of service as Chief Mate on Ocean/NC steam or motor vessels; or 360 days of service, while holding an endorsement as Chief Mate Ocean or Near Coastal, of which 180 days of service as Chief Mate on Ocean or Near Coastal waters, and service as OICNW accepted on a 2 for 1 basis for a maximum of 180 days. There are also tonnage requirements. Other requirements include completing a Basic Safety Training; or Continued Competency in BST, Flashing Light- course, and a valid, approved radar observer course. All candidates must complete an examination.
