A Complete Epitome of Practical Navigation, and Nautical Astronomy: Containing All Necessary Instructions for Keeping a Ship's Reckoning at Sea, Volumen1Imray, Laurie, Norie and Wilson, 1917 - 595 páginas |
Dentro del libro
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Página ix
... Distance of an Object by Two Bearings , and the Distance Run between them Position by the Isosceles Triangle ; Doubling the Bearing ; Distance by the Altitude of a High Light seen on the Sea Horizon ; Tables showing the various cases of ...
... Distance of an Object by Two Bearings , and the Distance Run between them Position by the Isosceles Triangle ; Doubling the Bearing ; Distance by the Altitude of a High Light seen on the Sea Horizon ; Tables showing the various cases of ...
Página 31
... distance , describe two arcs cutting each other in F ; through the points C and F draw a line , and it will be ... distance A C describe the arc C E ; then from any other part of the given line nearly under the point C , as at D , with ...
... distance , describe two arcs cutting each other in F ; through the points C and F draw a line , and it will be ... distance A C describe the arc C E ; then from any other part of the given line nearly under the point C , as at D , with ...
Página 59
... distance , added to the height of the eye , will give the height of the object . Example . From the bottom of a tower I measured 200 feet on a horizontal plane ; I then took the angle of elevation , and found it 40 ° 30 ' , the height ...
... distance , added to the height of the eye , will give the height of the object . Example . From the bottom of a tower I measured 200 feet on a horizontal plane ; I then took the angle of elevation , and found it 40 ° 30 ' , the height ...
Página 60
... Distance of Two Points on a Horizontal Plane , which are Inaccessible Let A and B be the objects : from C , one extremity of a measured distance , observe the angles B C A and B C D ; from D , the other extremity of the measured distance ...
... Distance of Two Points on a Horizontal Plane , which are Inaccessible Let A and B be the objects : from C , one extremity of a measured distance , observe the angles B C A and B C D ; from D , the other extremity of the measured distance ...
Página 61
... distance of one nautical mile being 5 ° . Ans . 531-9 feet . 2. The angle of elevation of a tower was 26 ° 30 ′ , and 150 yards nearer to it the angle of elevation was 51 ° 30 ′ ; find the height of the tower , and the distance of its ...
... distance of one nautical mile being 5 ° . Ans . 531-9 feet . 2. The angle of elevation of a tower was 26 ° 30 ′ , and 150 yards nearer to it the angle of elevation was 51 ° 30 ′ ; find the height of the tower , and the distance of its ...
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Otras ediciones - Ver todas
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,J. W. Saul Sin vista previa disponible - 2018 |
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,William Henry Rosser Sin vista previa disponible - 2018 |
A Complete Epitome of Practical Navigation, and Nautical Astronomy ... John William Norie,J W Saul Sin vista previa disponible - 2022 |
Términos y frases comunes
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
Pasajes populares
Página 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.
Página 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.
Página 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...
Página 26 - The circumference of a circle is divided into 360 equal parts, called degrees; each degree into 60 minutes ; each minute into 60 seconds.
Página 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.
Página 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.
Página 73 - The shortest DISTANCE between two points on the surface of a sphere is the arc of a great circle passing through those points.
Página 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.
Página 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...
Página 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.