1. Latitude by meridian altitude of the sun. 2. Latitude by meridian altitude of a star. 3. Longitude by chronometer (A.M. and P.M.). 4. Deviation of the compass by an amplitude. 5. Deviation of the compass by an azimuth. 6. Day's work. 7. Mercator's sailing. 8. Determination of distance from a fixed object. 9. Chart navigation. 10. Storm signals. 11. International code of signals. 12. International rules for preventing collisions at sea. 13. Stowage of cargo. 14. Use of gun and rocket apparatus for saving life from shipwreck, as practiced by the United States Coast Guard. 15. Such further examination of a non-mathematical character as the local inspectors may require. Third mate of ocean steam vessels. 30. An applicant for license as third 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._ Two years' service in the deck department of ocean or coastwise steam vessels, or _Second._ Three years' service in the deck department of ocean or coastwise sail vessels, or _Third._ A graduate from the seamanship class of a nautical school ship, or _Fourth._ One year's service as master or pilot of lake, bay, or sound steamers. In cases where the experience of an applicant for license as third 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. Examination for license as third mate of ocean steam vessels. 31. An applicant for license as third mate of ocean steam vessels shall be required to pass a satisfactory examination as to his knowledge of the following subjects: 1. Latitude by meridian altitude of the sun. 2. Day's work. 3. Mercator's sailing. 4. Determination of distance from a fixed object. 5. Chart navigation. 6. International rules for preventing collisions at sea. 7. Stowage of cargo. 8. Storm signals. 9. Such further examination of a non-mathematical character as the local inspectors may require. Chief mate of coastwise steam vessels. 32. An applicant for chief mate of coastwise 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 second mate of ocean or coastwise steam vessels, or _Second._ One year's service as first-class pilot of lake, bay, sound steam vessels, together with one year's service as quartermaster or wheelsman on ocean or coastwise steam vessels while holding a license as first-class pilot of lake, bay, or sound steam vessels, or _Third._ Two years' service as third mate of ocean or coastwise steam vessels, or