A Complete Epitome of Practical Navigation, and Nautical Astronomy: Containing All Necessary Instructions for Keeping a Ship's Reckoning at Sea, Volume 1Imray, Laurie, Norie and Wilson, 1917 - 595 pages |
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Page 69
... latitude it would be laid off in the direction of N ; bisect d ' d " in ƒ , and ƒ is the centre of the parallel of declination and ƒ d ' its radius ; draw the circle d d d and it is the required parallel . Explanation of Figure I WOE ...
... latitude it would be laid off in the direction of N ; bisect d ' d " in ƒ , and ƒ is the centre of the parallel of declination and ƒ d ' its radius ; draw the circle d d d and it is the required parallel . Explanation of Figure I WOE ...
Page 70
... latitude by ex - meridian altitude and latitude by the pole star to scale ... lat . 90 ° Hour - angle 4 hrs . Polar Dist . 50 6 Diff . Sum = = 40 140 Comp ... required hour circle . To draw the Parallel of Declination From Z lay off ...
... latitude by ex - meridian altitude and latitude by the pole star to scale ... lat . 90 ° Hour - angle 4 hrs . Polar Dist . 50 6 Diff . Sum = = 40 140 Comp ... required hour circle . To draw the Parallel of Declination From Z lay off ...
Page 73
Containing All Necessary Instructions for Keeping a Ship's Reckoning at Sea John William Norie, J. W. Saul. d N d " W 23 ... required and is the radius of the equinoctial . It is obvious that as the latitude decreases to o ° the radius of ...
Containing All Necessary Instructions for Keeping a Ship's Reckoning at Sea John William Norie, J. W. Saul. d N d " W 23 ... required and is the radius of the equinoctial . It is obvious that as the latitude decreases to o ° the radius of ...
Page 78
... latitude and longitude are required to fix the position ; and when we say that a ship is in lat . 46 ° 20 ′ N. , long . 32 ° 40 ′ W. , we have its PLACE AT SEA accurately noted - a spot in the Atlantic - and a course can be shaped ...
... latitude and longitude are required to fix the position ; and when we say that a ship is in lat . 46 ° 20 ′ N. , long . 32 ° 40 ′ W. , we have its PLACE AT SEA accurately noted - a spot in the Atlantic - and a course can be shaped ...
Page 79
... latitude between the Lizard and Cape Finisterre ? EXAMPLE II . A ship from lati- tude 3 ° 10 ′ S. arrives in latitude 2 ° 26 ' N. required the difference of latitude made good . Latitude of the Lizard .. 49 ° 58 ′ N. Latitude left 3 ° 10 ' ...
... latitude between the Lizard and Cape Finisterre ? EXAMPLE II . A ship from lati- tude 3 ° 10 ′ S. arrives in latitude 2 ° 26 ' N. required the difference of latitude made good . Latitude of the Lizard .. 49 ° 58 ′ N. Latitude left 3 ° 10 ' ...
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Other editions - View all
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,J. W. Saul No preview available - 2018 |
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,William Henry Rosser No preview available - 2018 |
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,J W Saul No preview available - 2022 |
Common terms and phrases
apparent azimuth bearing centre chart chronometer circle co-latitude Co-sec column compass course Corr correction course and distance dead reckoning decl declination departure deviation Diff difference of latitude difference of longitude direction dist distance run earth east equal equator equinoctial Example feet given Greenwich date Greenwich mean heavenly body horizon hour angle index error interval leeway logarithm magnetic course meridian altitude middle latitude miles millibars moon moon's Nautical Almanac noon Northern Hemisphere observed altitude parallax parallel parallel sailing plane plane sailing point of Aries polar distance pole port position prime vertical refraction required the latitude right angles right ascension sailing set and drift sextant ship ship's head side sidereal star subtract tide Traverse Table triangle true altitude true course variation vernier vertical wind zenith distance ΙΟ
Popular passages
Page 223 - January 31, February 28, March 31, April 30, May 31, June 30, July 31, August 31, September 30, October 31, November 30, December 31.
Page 37 - The square described on the hypothenuse of a right-angled triangle is equivalent to the sum of the squares described on the other two sides.
Page 221 - Ascension, and the interval between the departure of any meridian from the mean Sun and its succeeding return to it is the duration of the mean solar day. Clocks and chronometers are adjusted to mean solar time ; so that a complete revolution (through 24 hours) of the hour hand of...
Page 26 - The circumference of a circle is divided into 360 equal parts, called degrees; each degree into 60 minutes ; each minute into 60 seconds.
Page 199 - The Ram, the Bull, the heavenly Twins, And next the Crab the Lion shines, The Virgin and the Scales ; The Scorpion, Archer, and He-goat, The Man that holds the watering-pot, And Fish with glittering tails.
Page 21 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Page 73 - The shortest DISTANCE between two points on the surface of a sphere is the arc of a great circle passing through those points.
Page 36 - Jf a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another ; and the exterior angle equal to the interior and opposite upon the same side ; and likewise the two interior angles upon the same side together equal to two right angles.
Page 161 - The relative effects of these two bodies on the oceanic waters are directly as their mass, and inversely as the square of their distance...
Page 36 - IF a straight line falling upon two other straight lines makes the exterior angle equal to the interior and opposite upon the same side of the line ; or makes the interior angles upon the same side together equal to two right angles ; the two straight lines shall be parallel to one another.