New American Practical NavigatorU.S. Government Printing Office, 1821 |
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Side iii
... mean of the sun's right ascension , taken from the Nautical Almanacs for the years 1817 , 1818 , 1819 , and 1820 . TABLE VII . contains the amplitudes of the sun for various latitudes and declinations , calculated by Taylor's logarithms ...
... mean of the sun's right ascension , taken from the Nautical Almanacs for the years 1817 , 1818 , 1819 , and 1820 . TABLE VII . contains the amplitudes of the sun for various latitudes and declinations , calculated by Taylor's logarithms ...
Side v
... mean of the sun's right ascension , taken from the Nautical Almanacs for the years 1817 , 1818 , 1819 , and 1820 . TABLE VII . contains the amplitudes of the sun for various latitudes and declinations , calculated by Taylor's logarithms ...
... mean of the sun's right ascension , taken from the Nautical Almanacs for the years 1817 , 1818 , 1819 , and 1820 . TABLE VII . contains the amplitudes of the sun for various latitudes and declinations , calculated by Taylor's logarithms ...
Side viii
... mean refraction ( given in Table XII . ) for various temperatures and densities of the air . The correc- tion given in this table is nearly the same as that deduced from Dr. Bradley's rule , which is as follows : -As the mean height of ...
... mean refraction ( given in Table XII . ) for various temperatures and densities of the air . The correc- tion given in this table is nearly the same as that deduced from Dr. Bradley's rule , which is as follows : -As the mean height of ...
Side xi
... mean of several altitudes of the sun taken near noon by a sextant or circle To find the latitude on shore by means of an artificial horizon Problems useful in navigation 120 To find the difference between the true and apparent direction ...
... mean of several altitudes of the sun taken near noon by a sextant or circle To find the latitude on shore by means of an artificial horizon Problems useful in navigation 120 To find the difference between the true and apparent direction ...
Side xiii
... mean refrac- tion for various heights of the thermometer and barometer Longitudes and Latitudes of the fixed stars XXXVI Nutation in right ascension and declination Augmentation of moon's semi- XLIII diameter , found by nonagesi- XXXVII ...
... mean refrac- tion for various heights of the thermometer and barometer Longitudes and Latitudes of the fixed stars XXXVI Nutation in right ascension and declination Augmentation of moon's semi- XLIII diameter , found by nonagesi- XXXVII ...
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American Practical Navigator: An Epitome of Navigation : Originally by ... Uten tilgangsbegrensning - 1962 |
Vanlige uttrykk og setninger
2Cor a-back a-head a-lee Aldebaran anchor angle apparent altitude arch azimuth bearing and distance brace cable calculated Cape centre Co-secant Co-sine Co-tang column compass Corr correction corresponding course and distance degrees Degs Diff difference of latitude difference of longitude Dist equal error EXAMPLE feet Funchal given Greenwich haul head sails heave horizon glass HourA.M larboard Latitude and Departure lee-way line of numbers logarithm mast mean meridian meridian altitude method middle latitude miles mizen moon moon's multiplied N.sine Nautical Almanac nearly noon observed altitude parallax parallel perpendicular plane Plane Sailing radius refraction rope rule sails sea account Secant semi-diameter sextant ship ship's side sine square star star's staysail subtracted sun's declination sun's right ascension tack taken Tangent tide topsails TRAVERSE TABLE triangle true distance tude variation veer wind windward zenith distance
Populære avsnitt
Side 2 - In any triangle, the sum of the three angles is equal to two right angles, or 180°.
Side 104 - ... or taking their difference when of contrary names ; the altitude to be reckoned from the south point of the horizon, when the latitude is north, and the contrary when south ; but when the sum exceeds 90°, it is to be taken from 180°...
Side 166 - To find the solidity of a pyramid and of a cone. RULE. — Multiply the area of the base by one third of its altitude, and the product will be its solidity.
Side 185 - The cause of the. tides is the unequal attraction of the sun and moon upon different parts of the earth. . For they attract the parts of the earth's surface nearest to them, with a greater force than they do its centre : and attract the centre more than they do the opposite surface. To restore this equilibrium the waters take a spheroidal figure, whose longer axis is directed towards the attracting luminary.
Side 24 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Side 186 - ... the miles the current sets per hour, and the bearing of the log will show the set of it. There is a very remarkable current, called the GULF STREAM, which sets in a north-east direction along the coast of America, * From Nathaniel Bowditch, THE NEW AMERICAN PRACTICAL NAVIGATOR, E.
Side 9 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Side 292 - In spherical triangles, whether right angled or oblique angled, the sines of the sides are proportional to the sines of the angles opposite to them.
Side 167 - If the vessel be double-decked, take the length thereof from the fore part of the main stem, to the after part of the stern post, above the upper deck ; the breadth thereof at the broadest part above the main wales...