A Complete Epitome of Practical Navigation ...author, and sold, 1852 - 688 páginas |
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Página xi
... observed Altitude of the Sun's lower Limb , when taken by a Fore Observation 70 71 XI . X. The Sun's Declination for 1852 , 1853 , .. 1854 , 1855 , & c . To correct the Sun's Declination for Longitude ....... ......... 12244 72 72 XII ...
... observed Altitude of the Sun's lower Limb , when taken by a Fore Observation 70 71 XI . X. The Sun's Declination for 1852 , 1853 , .. 1854 , 1855 , & c . To correct the Sun's Declination for Longitude ....... ......... 12244 72 72 XII ...
Página xii
... observed ...... .................................. 276 278 283 .... 283 284 L. For correcting the Auxiliary Angle when a Planet is observed ... 284 LI . For reducing the Equation of Time to any Time under the Meridian of Greenwich LII ...
... observed ...... .................................. 276 278 283 .... 283 284 L. For correcting the Auxiliary Angle when a Planet is observed ... 284 LI . For reducing the Equation of Time to any Time under the Meridian of Greenwich LII ...
Página 119
... observed in the last example , it will in general be sufficiently exact to construct the figure , and measure off the distances required . In this manner rocks , buoys , shoals , or soundings may be accurately laid down on adjacent ...
... observed in the last example , it will in general be sufficiently exact to construct the figure , and measure off the distances required . In this manner rocks , buoys , shoals , or soundings may be accurately laid down on adjacent ...
Página 120
... observed the first bear from me S. W. b . W. W. , and the second E. S. E .; after running S. b . W. § W. 15 miles , the first bore from me N. W. b . W. , and the second E. § N. : required the bearings , and distance between the islands ...
... observed the first bear from me S. W. b . W. W. , and the second E. S. E .; after running S. b . W. § W. 15 miles , the first bore from me N. W. b . W. , and the second E. § N. : required the bearings , and distance between the islands ...
Página 132
... observations made either on shore or on the water . In the former case , find a level spot of ground near the shore ... observe their bearing as accurately as possible by an azimuth compass . If a base - line of sufficient length cannot ...
... observations made either on shore or on the water . In the former case , find a level spot of ground near the shore ... observe their bearing as accurately as possible by an azimuth compass . If a base - line of sufficient length cannot ...
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Términos y frases comunes
angle Answer Apparent distance Arc second arch azimuth Bearing and Distance Chro chron Co-sec Co-sine Co-tan compass Corr correction corresponding course and distance degrees difference of latitude difference of longitude Dist Ditto East Equation EXAMPLE extent will reach feet given Greenwich mean Half-sum height horizon horizon-glass index error Latitude and Departure latitude by account logarithm LOGARITHMIC SINES meridian altitude middle latitude miles minutes moon Moon's apparent altitude Moon's horizontal parallax Natural Versed Nautical Almanac nonius noon North observed altitude observer's eye parallel perpendicular planet points Porto Santo radius refraction remainder required the latitude required the true right ascension sails Secant seconds sextant ship ship's sine South star subtracted Sun's declination sun's lower limb Sun's right ascension Sun's semidiameter Sun's true altitude Suvers taken Tang tangent true distance true longitude upper limb variation West zenith distance
Pasajes populares
Página 20 - A circle is a plane figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the center, Fig.
Página 17 - Multiply the index of the quantity by the index of the power to which it is to be raised, and the result will be the power required.
Página 16 - 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 159 - 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 5 - LV. contains the times of high water on the full and change of the moon, with the vertical rise of the tide, at many ports, harbors.
Página 15 - Consequently, when the first three terms of a proportion are given, the fourth is found by multiplying the second and third terms together, and dividing the product by the first term.
Página 231 - ... will be double the altitude of the sun's limb above the horizontal plane ; to the half of which, if the semidiameter, refraction, and parallax be applied, the result will be the true altitude of the centre.
Página 20 - For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; each minute into 60 equal parts called seconds.
Página 52 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 37 - ... division. Or the extent from any division to another on the line of meridional parts, applied to the line of equal parts, will give the meridional difference of latitude between the two places denoted by the divisions.