Shipmaster View

Training institutions that can lead to a third mate's license include the U.S. Merchant Marine Academy (deck curriculum), the U.S. Coast Guard Academy and U.S. Naval Academy with qualification as an underway officer in charge of a navigational watch, any of the Five state maritime colleges in Maine, Massachusetts, New York, Texas, or California or the Great Lakes Maritime Academy, or a three-year apprentice mate training program approved by the Commandant of the U.S. Coast Guard.
A seaman may start the process of attaining a license after three years of service in the deck department on ocean steam or motor vessels, at least six months of which as able seaman, boatswain, or quartermaster. Then the seaman takes required training courses, and completes on-board assessments. Finally, the mariner can apply to the United States Coast Guard for a third mate's license.
An alternate method of obtaining a license as a master of vessels of any gross tons upon oceans, without sailing as a third, second, or chief mate, is to obtain one year of seatime as a 1st class pilot of any gross tons or mate of vessels of any gross tons upon Great Lakes and inland waters. Then pass an examination for the license of master of vessels of any gross tons upon Great Lakes and inland waters. A master of vessels of any gross tons upon Great Lakes and inland waters may, without any additional seatime, take the examination for master of vessels of any gross tons upon near coastal waters. If the candidate does not already have sufficient deep sea experience he may with six months of additional seatime, in any licensed capacity, take a partial examination consisting primarily of celestial navigation and have the near coastal restriction removed. 46CFR 11.403
A master of 1,600 ton vessels can, under certain circumstances, begin the application process for an unlimited third mate's license.