Master of ocean steam vessels.
21. An applicant for license as master of ocean steam vessels shall be eligible for examination after he has furnished satisfactory documentary evidence to the local inspectors that he has had the following experience:
First. One year's service as chief mate of ocean steam vessels, or
Second. Two years' service as second mate of ocean steam vessels, one year of such service while holding a license as chief mate of ocean steam vessels, or
Third. Two years' service as watch officer actually in charge of a bridge watch on ocean steam vessels, while holding a license as chief mate of ocean steam vessels, or
Fourth. Five years' service as third mate of ocean steam vessels, two years of such service while holding a license as chief mate of ocean steam vessels, or
Fifth. Five years' service on ocean sail vessels of 300 gross tons or over, two years of such service while holding a license as master of sail vessels, or
Sixth. One year's service as master or chief mate of coastwise steam vessels.