Guide Book to the Local Marine Board Examination: The Ordinary Examination |
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... Parallel Sailing Middle Latitude Sailing The Day's Work Mercator's Sailing .. .. .. 143 167 .. 171 177 . 180 .. Preliminary Rules in Nautical Astronomy - The Conversion of Civil into 183 .. 189 Astronomical Time 218 The Conversion of ...
... Parallel Sailing Middle Latitude Sailing The Day's Work Mercator's Sailing .. .. .. 143 167 .. 171 177 . 180 .. Preliminary Rules in Nautical Astronomy - The Conversion of Civil into 183 .. 189 Astronomical Time 218 The Conversion of ...
Page 9
... Parallels of Latitude . 8. Longitude . 23. Declination . 24. Polar Distance . 25. Right Ascension . 26. Dip or Depression of the Horizon . 27. Refraction . 28. Parallax . 29. Semi - diameter . The 30. Augmentation of Moon's Semi ...
... Parallels of Latitude . 8. Longitude . 23. Declination . 24. Polar Distance . 25. Right Ascension . 26. Dip or Depression of the Horizon . 27. Refraction . 28. Parallax . 29. Semi - diameter . The 30. Augmentation of Moon's Semi ...
Page 83
... parallel circles have the same poles . The distance of every point in the circumference of a circle from either of its poles is the same . The poles of a great circle are 90 ° distant from every point of the circle . 118. Regarding any ...
... parallel circles have the same poles . The distance of every point in the circumference of a circle from either of its poles is the same . The poles of a great circle are 90 ° distant from every point of the circle . 118. Regarding any ...
Page 85
... parallels of latitude , and all places on O F , and b B ' , & c . , have the same latitude , being on the same parallel . 127. Co - Latitude is the complement of the latitude to 90 ° ; thus the co - latitude of A ' ( fig . , page 84 ) ...
... parallels of latitude , and all places on O F , and b B ' , & c . , have the same latitude , being on the same parallel . 127. Co - Latitude is the complement of the latitude to 90 ° ; thus the co - latitude of A ' ( fig . , page 84 ) ...
Page 86
... parallel passing mid- way between them ; its value is therefore half the sum of the latitudes of the two places . When the two places are situated on opposite sides of the equator , the simple " middle latitude " is replaced by the two ...
... parallel passing mid- way between them ; its value is therefore half the sum of the latitudes of the two places . When the two places are situated on opposite sides of the equator , the simple " middle latitude " is replaced by the two ...
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A Guide Book to the Local Marine Board Examination: The Ordinary Examination ... Thomas Liddell Ainsley No preview available - 2013 |
Common terms and phrases
A.M. at ship altitude sun's L.L. angle bearing by compass Bearing of Distant central line characteristic chronometer column common logarithms compass course correct magnetic bearing correct magnetic course corresponding cosecant cosine course and distance curve cyphers decimal point decl declination departure Deviation Required diff difference of latitude difference of longitude dist Distant Object Divide dividend divisor dotted line East equator error of compass EXAMPLES FOR PRACTICE figures find the correct given Greenwich date Greenwich mean Head by Standard height of eye hour-angle hundred index corr index correction Leeway logarithm mantissa Mate meridian altitude middle latitude miles Multiply Nautical Almanac needle North Object by Standard observed altitude sun's parallel parallel sailing pole quotient Raper remainder required the latitude Rule sailing secant ship's head sine South Standard Compass subtract Traverse Table True altitude true azimuth true course variation vulgar fractions West
Popular passages
Page 48 - The Logarithm of a number to a given base is the index of the power to which the base must be raised to give the number. Thus if m = a", x is called the logarithm of m to the base a.
Page 30 - PROOF. — Multiply the divisor by the quotient, and to the product add the remainder, if any.
Page 2 - Testimonials of character, and of sobriety, experience, ability, and good conduct on board ship will be required of all applicants, and without producing them no person will be examined. As such testimonials may have to be forwarded to the office of the Registrar-General of Seamen in London for verification before any certificates can be granted, it is desirable that candidates should lodge them as early as possible. The testimonials of...
Page 116 - Unlike sea water, brackish waters differ in quality, quantity, and composition not only from place to place, but also from time to time even at a given location.
Page 5 - Mates are made compulsory, the qualifications have been kept as low as possible; but it must be distinctly understood that it is the intention of the Board of Trade to raise the standard from time to time, whenever, as will no doubt be the case, the general attainments of officers in the Merchant Service shall render it possible to do so without inconvenience...
Page 3 - He will be questioned as to his knowledge of invoices, charter-party, Lloyd's agent, and as to the nature of bottomry, and. he must be acquainted with the leading lights of the channel he has been accustomed to navigate, or which he is going to use. In cases where an applicant for a certificate as master ordinary has only served in a fore and aft rigged vessel...
Page 3 - In addition to what is required by a Second Mate, he must know how to moor and unmoor, and to keep a clear anchor ; to carry out an anchor ; to stow a hold ; and to make the requisite entries in the ship's log.
Page 351 - How would you find the time of high- water at any place, the Admiralty tide tables not being at hand, nor any other special tables available '{ A.
Page 328 - With the deviation as above, give the courses you would steer by the Standard Compass to make the following courses, correct magnetic : — . . 9.
Page 106 - The variation is said to be easterly when the North end of the needle is drawn to the eastward, and westerly when drawn to the westward of the true North ; thus, when the North end of the needle points to that part of the horizon which is true NNW £ W., the variation is said to be 2^ points West ; but when it points to the N.