Guide Book to the Local Marine Board Examination: The Ordinary ExaminationSimpkin, Marshall, 1875 - 396 páginas |
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... Longitude To Find the Longitude in .. .. 94 95 The Compass 97 Correcting Courses - Leeway .. 104 Variation 106 Napier's Diagram Variation and Leeway Deviation of the Compass On the Traverse Table Traverse Sailing .. 110 114 Parallel ...
... Longitude To Find the Longitude in .. .. 94 95 The Compass 97 Correcting Courses - Leeway .. 104 Variation 106 Napier's Diagram Variation and Leeway Deviation of the Compass On the Traverse Table Traverse Sailing .. 110 114 Parallel ...
Página 3
... longitude by chronometer by the usual methods . He must know how to lay off the place of the ship on the chart , both by bearings of known objects , and by latitude and longitude . He must be able to determine the error of a sextant ...
... longitude by chronometer by the usual methods . He must know how to lay off the place of the ship on the chart , both by bearings of known objects , and by latitude and longitude . He must be able to determine the error of a sextant ...
Página 85
... longitude , and are hence called " Circles of Longitude . " Every portion of the meridian lies north and south ; and places lying north and south of each other are said to be on the same meridian . The direction of the meridian towards ...
... longitude , and are hence called " Circles of Longitude . " Every portion of the meridian lies north and south ; and places lying north and south of each other are said to be on the same meridian . The direction of the meridian towards ...
Página 86
... longitude become less and less . In the chart , on Mercator's projection , the degrees of longitude are made everywhere of the same length , and , therefore , to preserve the proportion that exists at every part of the earth's surface ...
... longitude become less and less . In the chart , on Mercator's projection , the degrees of longitude are made everywhere of the same length , and , therefore , to preserve the proportion that exists at every part of the earth's surface ...
Página 87
... longitude of the meridian N W S , or of any place on that meridian . Longitude is reckoned from the first meridian , both eastward and west- ward , till it meets at the opposite point of the equator , therefore the longitude can never ...
... longitude of the meridian N W S , or of any place on that meridian . Longitude is reckoned from the first meridian , both eastward and west- ward , till it meets at the opposite point of the equator , therefore the longitude can never ...
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A Guide Book to the Local Marine Board Examination: The Ordinary Examination ... Thomas Liddell Ainsley Sin vista previa disponible - 2013 |
Términos y frases comunes
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
Pasajes populares
Página 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.
Página 30 - PROOF. — Multiply the divisor by the quotient, and to the product add the remainder, if any.
Página 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...
Página 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.
Página 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...
Página 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...
Página 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.
Página 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.
Página 328 - With the deviation as above, give the courses you would steer by the Standard Compass to make the following courses, correct magnetic : — . . 9.
Página 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.