Classes of licenses.

Six classes of licenses shall be granted: (1) First class, to persons capable of piloting ships or vessels of any practical draft of water; (2) Second class, to persons capable of piloting ships or vessels drawing 45 feet of water or under; (3) Third class, to persons capable of piloting ships or vessels drawing 40 feet of water or under; (4) Fourth class, to persons capable of piloting ships or vessels drawing 35 feet of water or under; (5) Fifth class, to persons capable of piloting ships or vessels drawing 32 feet of water or under; and (6) Sixth class, to persons capable of piloting ships or vessels drawing 27 feet of water or under.