A Complete Epitome of Practical Navigation ...author, and sold, 1852 - 688 páginas |
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Página v
... means calculated to answer all the purposes of the Mariner , Teacher , or Pupil . With a view to remedy these defects ... mean to arrogate to myself any superior pro- fessional merit , yet I humbly apprehend that my long experience , and ...
... means calculated to answer all the purposes of the Mariner , Teacher , or Pupil . With a view to remedy these defects ... mean to arrogate to myself any superior pro- fessional merit , yet I humbly apprehend that my long experience , and ...
Página x
... mean time by an Altitude of the Sun ............... 230 To find the apparent or mean time by an Altitude of a Star 210 210 212 216 218 221 223 225 ..... ........ 228 233 To find the apparent or mean time by an Altitude of a Planet ...
... mean time by an Altitude of the Sun ............... 230 To find the apparent or mean time by an Altitude of a Star 210 210 212 216 218 221 223 225 ..... ........ 228 233 To find the apparent or mean time by an Altitude of a Planet ...
Página xi
... mean Right Ascension ... 76 ...... 77 77 XV . For correcting the observed Altitude of a Fixed Star , to find the ... Mean Solar Time ... ........ XXXVIII . For reducing Mean Solar Time to Sidereal Time XXXIX . Logarithmic Difference ...
... mean Right Ascension ... 76 ...... 77 77 XV . For correcting the observed Altitude of a Fixed Star , to find the ... Mean Solar Time ... ........ XXXVIII . For reducing Mean Solar Time to Sidereal Time XXXIX . Logarithmic Difference ...
Página 143
... mean distance from that luminary above 36 millions of miles . His periodic revolution is performed in 87 days 23 hours . To a spectator on the earth this planet keeps so near the sun , that we can seldom discern him without the aid of ...
... mean distance from that luminary above 36 millions of miles . His periodic revolution is performed in 87 days 23 hours . To a spectator on the earth this planet keeps so near the sun , that we can seldom discern him without the aid of ...
Página 153
... mean solar day exceeding the sidereal day by 3m . 56. 55s . of sidereal time . * Since we can obtain only apparent time immediately from observations of the heavenly bodies , we must , in order to reduce this to mean time , apply a ...
... mean solar day exceeding the sidereal day by 3m . 56. 55s . of sidereal time . * Since we can obtain only apparent time immediately from observations of the heavenly bodies , we must , in order to reduce this to mean time , apply a ...
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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.