Before revision: A sample United States Merchant Marine license issued by the United States Coast Guard in 2006 A licensed mariner is a person who holds a license from a country's maritime authority to hold senior positions aboard ships, boats, and similar vessels.
After revision: A sample United States Merchant Marine license issued by the United States Coast Guard in 2006 A licensed mariner is a sailorofficer-level who holds a license from a country's maritime authority to hold senior positions aboard ships, boats, and similar vessels.