In cases where the experience of an applicant for license as master of sail vessels does not meet the specific requirements of this section, other service which the local inspectors consider a fair and reasonable equivalent may be accepted by them in lieu of the service herein specified. Examination for license as master of sail vessels. 26. An applicant for license as master of sail vessels shall pass a satisfactory examination as to his knowledge of the following subjects: 1. Latitude by meridian altitude of the sun. 2. Latitude by pole star. 3. Longitude by chronometer (A.M. and P.M.). 4. Day's work. 5. Mercator's sailing. 6. Deviation of the compass by an amplitude. 7. Deviation of the compass by an azimuth. 8. Chart navigation. 9. International code of signals. 10. Storm signals. 11. International rules for preventing collisions at sea. 12. Use of gun and rocket apparatus for saving life from shipwreck, as practiced by the U. S. Coast Guard. 13. Such further examination of a non-mathematical character as the local inspectors may require. Chief mate of ocean steam vessels. 27. An applicant for license as chief mate 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 a licensed second mate of ocean or coastwise steam vessels, or _Second._ Two years' service as watch officer on ocean or coastwise steam vessels, while holding license as second mate of ocean or coastwise steam vessels, or _Third._ Two years' service as third mate of ocean or coastwise steam vessels, one year of such service while holding a license as second mate of ocean or coastwise steam vessels, or _Fourth._ Two years' service as master of lake, bay, or sound steam vessels of 1,000 gross tons or over, or _Fifth._ Five years' service in the deck department of ocean or coastwise sail vessels of 200 gross tons or over, two years of which service as chief mate of such ocean or coastwise sail vessels, or _Sixth._ Two years' service in the deck department of steam vessels engaged in the ocean or coastwise fisheries, one year of such service to have been as master of such vessels, or _Seventh._ Five years' service in the deck department of sail vessels engaged in the ocean or coastwise fisheries, two years of such service to have been as master of such vessels. In cases where the experience of an applicant for license as chief mate of ocean steam vessels does not meet the specific requirements of this section, other service which the local inspectors consider a fair and reasonable equivalent may be accepted by them in lieu of the service herein specified. Second mate of ocean steam vessels.