Guide Book to the Local Marine Board Examination: The Ordinary Examination |
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... Hour - angle .. On Finding the Longitude by Chronometer On Finding the Variation by an Azimuth On Finding the Latitude by Reduction to Meridian On Finding the Latitude by a Meridian Altitude of a Fixed Star Examination Papers Quadrant ...
... Hour - angle .. On Finding the Longitude by Chronometer On Finding the Variation by an Azimuth On Finding the Latitude by Reduction to Meridian On Finding the Latitude by a Meridian Altitude of a Fixed Star Examination Papers Quadrant ...
Page 8
... hour- angle should be taken out for seconds of arc . 12. In all other problems the logarithms to the nearest minute will be sufficiently correct for all grades , except Extra Master , from whom a degree of precision will be required ...
... hour- angle should be taken out for seconds of arc . 12. In all other problems the logarithms to the nearest minute will be sufficiently correct for all grades , except Extra Master , from whom a degree of precision will be required ...
Page 9
... Hour Angle of a Celestial Object . 21 . Azimuth . 44 . Complement of an Arc or Angle . 22. Amplitude . 45. Supplement of Ditto . List B. referred to in Circular . DEVIATION OF THE COMPASS . The Candidate is to answer correctly at least ...
... Hour Angle of a Celestial Object . 21 . Azimuth . 44 . Complement of an Arc or Angle . 22. Amplitude . 45. Supplement of Ditto . List B. referred to in Circular . DEVIATION OF THE COMPASS . The Candidate is to answer correctly at least ...
Page 71
... angle = Nat . cosine of next less angle or 43 ° 13 ' Tab . diff . 334 Hour angle required 43 ° 13 ′ 17 ′′ . 728713 728769 334 ) 5600 ( 17 " nearly , to be 334 added . 2260 2338 1 . EXAMPLES FOR PRACTICE . Given the nat . sines , to find the ...
... angle = Nat . cosine of next less angle or 43 ° 13 ' Tab . diff . 334 Hour angle required 43 ° 13 ′ 17 ′′ . 728713 728769 334 ) 5600 ( 17 " nearly , to be 334 added . 2260 2338 1 . EXAMPLES FOR PRACTICE . Given the nat . sines , to find the ...
Page 219
... angle between the first meridian and the meridian of the place , and thus ... hour or 60m ) I ' I " 19 4 ( ie . , the 15th part of 1 minute or 60 * ) 4t ... hour is also divided into sixty minutes , and the minutes into sixty seconds ...
... angle between the first meridian and the meridian of the place , and thus ... hour or 60m ) I ' I " 19 4 ( ie . , the 15th part of 1 minute or 60 * ) 4t ... hour is also divided into sixty minutes , and the minutes into sixty seconds ...
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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.