He will be examined orally on the following subjects:-

(l.) Leading principles of the construction of the sextant and vernier; mechanical logs and sounding machines.

(m.) Civil duties of a shipmaster, in which he will be expected to show a more extensive knowledge than a candidate for an ordinary master's certificate.

In signalling he will be required to attain a minimum speed of twelve words a minute in semaphore, ten words a minute in Morse flashing, and six words a minute in Morse flag-waving.

The construction of the problems mentioned above, and of the compass problems, must be shown as follows:-

(a.) A circle should be drawn projected on the plane of the horizon – unless the problem can be shown better otherwise—and a correct figure drawn in it, the magnitude of the sides and angles being estimated approximately by the eye.

(b.) The sides and angles used in solving the problem should be marked by distinguishing-letters in the figure, and the candidate should over each fresh computation write down clearly what is given and what he is required to find, together with the formula which he proposes to use.

(c.) Opposite each quantity in the computation he should put the letters denoting the part of the triangle which it represents, writing “comp.” before the letters when the quantity is the complement of that part of the triangle.

Candidates will not be required to enter into the mathematical investigation of the rules and formulæ used in the solution of the problems involving oblique-angled spherical triangles, but credit will be given to any candidate showing such knowledge. When, however, a problem or part of a problem is solved by right-angled spherical trigonometry, the simple process of deducing the formula from the figure by Napier’s rules for circular parts or other method must be shown.

Where a problem is solved by right-angled plane trigonometry, the simple process of deducing the formula from the figure for each of the computations in it must be shown.

The rule for finding the latitude by meridian altitude must be proved by the figure.

Protractors must not be used in the chart-construction problem, either for setting off variation or laying off positions. All sketches and drawings required in the paper on naval architecture should be neatly done on paper supplied by the Examiner.

76. Examination in Seamanship.—In addition to the qualifications required of an ordinary master, an extra master will be expected to give satisfactory answers to any questions in practical seamanship that the Examiner may put to him.

EXTRA CERTIFICATES, STEAMSHIPS.

77. Extra Certificates, Steamships.—Extra certificates for steamships will also be issued, subject to the examination described below, to officers who can show the necessary service in steamships. The certificates will be marked “For steamships only,” and will only entitle the holders to go to sea as masters of steamships.

The examination is open to all who are qualified to go up for a certificate as master of a foreign-going steamship, or who have already obtained that certificate. (See also para. 161.) It is open also to candidates who have failed in the examination for an extra master’s certificate to show the requisite knowledge of the management of square-rigged sailing-vessels, provided they can prove the necessary amount of officer’s service in steamships. (See para. 20.)

78. Examination in Navigation.—The examination in navigation for an extra master's certificate for steamships will be precisely the same as that prescribed for an extra master's certificate.

79. Examination in Seamanship.—In addition to the qualifications required of a master of a foreign-going steamship, the extra master will be expected to give satisfactory answers to any questions appertaining to the management of a steamship that the Examiner may put to him.

CERTIFICATES FOR PLEASURE-YACHTS.

80. Yacht Certificates.—The examination for these certificates is purely voluntary, and is confined to persons who command their own