Hand-book to the Local marine board examination [by J. Taylor].1853 |
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Página 24
... apparent day , which is measured by two successive passages of the sun over the meridian of any place on the earth's surface , is a variable quantity ; but there is a regular succession of its variations , which 24 On Time.
... apparent day , which is measured by two successive passages of the sun over the meridian of any place on the earth's surface , is a variable quantity ; but there is a regular succession of its variations , which 24 On Time.
Página 25
... apparent solar days in the year . The interval by which the apparent is in excess or falls short of the mean day , constitutes the equation of time ; this difference is greatest about the 3rd of November , and four times in a year viz ...
... apparent solar days in the year . The interval by which the apparent is in excess or falls short of the mean day , constitutes the equation of time ; this difference is greatest about the 3rd of November , and four times in a year viz ...
Página 27
... apparent time at ship ; but the ship had made 16 ' diff . long . to W. since the error for apparent time had been ascertained ; required the true latitude . Additional for Master Ordinary . 11. Correct the following courses for the ...
... apparent time at ship ; but the ship had made 16 ' diff . long . to W. since the error for apparent time had been ascertained ; required the true latitude . Additional for Master Ordinary . 11. Correct the following courses for the ...
Página 28
... apparent time at ship , but the ship had made 10 ' diff . long . to E. since the error for apparent time had been determined : required the true latitude . Additional for Master Ordinary . 11. Correct the following courses for local ...
... apparent time at ship , but the ship had made 10 ' diff . long . to E. since the error for apparent time had been determined : required the true latitude . Additional for Master Ordinary . 11. Correct the following courses for local ...
Página 29
... apparent time at ship , but the ship bad made 5 ′ di . long . to E. since the error for apparent time had been determined : required the true latitude . Additional for Master Ordinary . 11. Correct the following courses for local ...
... apparent time at ship , but the ship bad made 5 ′ di . long . to E. since the error for apparent time had been determined : required the true latitude . Additional for Master Ordinary . 11. Correct the following courses for local ...
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Hand-Book to the Local Marine Board Examination [By J. Taylor] Janet Taylor,Trade Board of Local Marine Board Sin vista previa disponible - 2015 |
Términos y frases comunes
according Additional allowed apparent applicant barometer bearing Board boilers cargo centre Certificate characterized charter-party chronometer circle clear commencing compass course cyclone damage determine Diff difference direction dist distance Divide East elapsed engines equal equator examination Explain feet feet required freight give given greater Greenwich half hauling Head hemisphere horizon hurricane inches index error interval knowledge latitude less Light logarithms logs longitude lunar March margin master Mate mean method miles minutes names nature necessary northern observed altitude observed meridian altitude ordinary parallel pass port portion receive reckoning recurving Remarks required the latitude required the true rule sailing seconds semi-circle ship ship's side star starboard Steam storm stowed sun's taken trade true latitude valves Variation vessel voyage weather West wind
Pasajes populares
Página 60 - London, (the act of God, the queen's enemies, fire, and all and every other dangers and accidents of the seas, rivers, and navigation, of whatever nature and kind soever, excepted,) unto order or to assigns, he or they paying freight for the said goods at 51.
Página 25 - Astronomers, with a view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days in a year. An imaginary Sun, called the mean Sun...
Página 40 - ... a bright white light so constructed as to show an unbroken light over an arc of the horizon of 20 points of the compass, so fixed as to throw the light 10 points on each side of the vessel...
Página 12 - If the applicant passes, he will receive a document from the examiner, which will entitle him to receive his certificate of competency from the shipping master at the port to which he has directed it to be forwarded.
Página 44 - Bundles of sheet iron, rods, pigs of copper or iron, or any rough hard substance, should not be allowed to come in contact with bales or bags, or any soft packages liable to be chafed. When mats can be procured, they should be used at the sides for silk, tea, &c 11 — Tar, Turpentine, Rosin, &c.
Página 40 - On the starboard side, a green light so constructed as to show an uniform and unbroken light over an arc of the horizon of 10 points of the compass ; so fixed as to throw the light from right ahead to 2 points abaft the beam...
Página 13 - 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 ; and Officers are strongly urged to employ their leisure hours, when in port, in the acquirement of the knowledge necessary to enable them...
Página 41 - On the port side a red light so constructed as to show an unbroken light over an arc of the horizon of 10 points of the compass, so fixed as to throw the light from right ahead to 2 points abaft the beam on the port side, and of such a character as to be visible at a distance of at least 2 miles.
Página 11 - He must be able to observe, and calculate the amplitude of the sun, and deduce the variation of the compass therefrom. 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...
Página 36 - ... to set the axis of the telescope parallel to the plane of the instrument...