Hand-book to the Local marine board examination [by J. Taylor].1853 |
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Página 23
... a point in Lat . 34 ° 30'S . Long . 172 ° 49'E . bearing E. by compass , distant 17 miles . A.M. A current sets to N. by compass at the rate of 10 miles in 24 hours . Variation 150 E. d Name of Light . Number of Lights . Interval Fixed. 23.
... a point in Lat . 34 ° 30'S . Long . 172 ° 49'E . bearing E. by compass , distant 17 miles . A.M. A current sets to N. by compass at the rate of 10 miles in 24 hours . Variation 150 E. d Name of Light . Number of Lights . Interval Fixed. 23.
Página 24
... intervals might be taken as the unit of admeasurement , and to this end , nothing seems more appropriate than that the ... interval measured by the ap- parent revolution of the Sun around our earth ; and since , if it had been adopted as ...
... intervals might be taken as the unit of admeasurement , and to this end , nothing seems more appropriate than that the ... interval measured by the ap- parent revolution of the Sun around our earth ; and since , if it had been adopted as ...
Página 25
... 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 . April 15 , June 15 , September 15 ...
... 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 . April 15 , June 15 , September 15 ...
Página 38
... interval indicated by the glass , will give the number of miles and parts of a mile the ship has sailed in an hour , supposing the rate of sailing to be uniform . The geographical mile being about 6080 feet , we have for glasses running ...
... interval indicated by the glass , will give the number of miles and parts of a mile the ship has sailed in an hour , supposing the rate of sailing to be uniform . The geographical mile being about 6080 feet , we have for glasses running ...
Página 46
... Interval of Revo- Miles seen in or Revolving lution or clear Flash . Weather . Remarks . Bishop Rock .. F. Building . St. Agnes 1 R. .... Every 16 minute . Seven Stones . 2 F. 10 Light Vessel Longships 1 F. 14 ..... Lizard 2 F. 20 ...
... Interval of Revo- Miles seen in or Revolving lution or clear Flash . Weather . Remarks . Bishop Rock .. F. Building . St. Agnes 1 R. .... Every 16 minute . Seven Stones . 2 F. 10 Light Vessel Longships 1 F. 14 ..... Lizard 2 F. 20 ...
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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
3rd cor A.M. at ship apparent course artificial horizon assumed latitude axis line azimuth barometer bearing bill of lading boilers bottomry Cape cargo centre Certificate charter-party Chief Mate chronometer Circle Sailing compass course and distance cross sea cyclone damage dead reckoning Diff Divide double altitude dunnage elapsed engines equator examination eye 18 feet eye 21 feet feet required foggy weather freight is due gong is sounded Greenwich hauling horizon hurricane index error Light Vessel logarithms lunar M. T. at Gr margin Marine Board minutes northern hemisphere observed altitude observed meridian altitude P.M. mean P.M. tides parallel sailing place 2h port semi-circle recurving required the latitude required the true required the variation Second Mate set and drift sextant ship by dead ship's slow on M. T. Steam storm stowed sun's lower limb true dist true latitude true longitude tude valves voyage West
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...