86
THE HONGKONG GOVERNMENT GAZETTE, FEBRUARY 12, 1910.
Time
allowed for Navigation. Ibid. Sec. 178.
Order of work.
Ibid. Sec. 179.
Sumner problem.
Ibid. Sec. 180.
Degree of precision required. Ibid See. 160.
No Can-
135. It is anticipated that few Candidates will require the whole of the time allowed for completing the examination in navigation, but ample time has been given, so that Candidates may perform their work in a careful, clear, and legible manner, and to the entire satisfaction of the examiners.
136. Candidates, after finishing the problems required in the various grades on the first day of examination, should proceed, until the end of that day, with such subject as the definitions, chart, questions relating to cyclones, and compass deviation.
137. The Summer problem (Exn. 6 c.) must on no account be given out to any of the Candidates on the first day of the examination, but should form the commencement of the Candidates' work on the second day. On completion of this problem the Candidates for Masters' Certificates should proceed with the problems (a.), (b.), (c.) of the syllabus for that grade.
138. Degree of precision required in the solution of the problems:- (a.) Candidates are expected to work out their answers to all problems where the answer required is a latitude, longitude or distance within 1 of position from a correct result; in finding the ship's position by Sumner's method a margin of 21 will be allowed.
(b.) In such problems as the "Amplitude” and “Alt-Azi- muth", where the bearing, deviations, &c., only are required, a margin of 3 or 4 from a correct result will be sufficiently accurate.
(c.) Candidates for Ordinary Certificates are not required to correct for second differences in taking out the quantities from the Nautical Almanac.
(d.) In solving the Time Azimuth problems an answer not exceeding half a degree from the exact result will be sufficiently near. But in all cases the actual latitude, declination, and time used, together with the exact hearing from the North or South as given in the tables, must be clearly shown by the Candidate on his
papers.
(e.) In computing the time at which a given star will be on the observer's meridian, and the name of the stars near the meridian (sections (b.) and (e.) of paragraph 36), an approximation only is required, and it will be sufficiently precise if the Candidate works throughout with the nearest minute of time. In computing the approximate meridian altitude of a star (section g.) working throughout with the nearest minute of are will also be sufficiently close.
(f.) In interpolating for the correct deviation to be applied in solving the chart question, it will usually be sufficient if the Candidate works throughout with the nearest degree of deviation taken from the deviation card; and even in cases where the deviations may vary but little, the nearest half degree used throughout will be sufficiently precise. It is not necessary that the Candidate should waste his time in solving the course to odd minutes, as is sometimes done.
(.) In calculating the correction to apply to soundings the Candidate is not required to work to the exact inch, as is sometimes done. It will be sufficient if he brings his answer within half a foot or so of a precise result.
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洳
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It must be clearly understood in reading the foregoing instructions as to the precision required, that they only apply when the work of the Candidate is correct in principle.
139. A Candidate will not be allowed to undergo examination didate to be twice in the same week, unless, under very special and urgent
circumstances the Harbour Master should see fit to relax this rule.
examined
twice in a
week.
Ibid. Sec. 166.
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