New American Practical NavigatorU.S. Government Printing Office, 1821 |
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Resultat 1-5 av 26
Side x
... glass 88 Description and use of a quadrant of reflection OFF * 1 1 1 2 2 8 10 5 5 5 trigonometry Geometrical ... horizon 107 52 To find the distance of the land in order to calculate the dip 109 To find the sun's declination 110 53 ...
... glass 88 Description and use of a quadrant of reflection OFF * 1 1 1 2 2 8 10 5 5 5 trigonometry Geometrical ... horizon 107 52 To find the distance of the land in order to calculate the dip 109 To find the sun's declination 110 53 ...
Side 89
... glass only is faulty , you must say , as the seconds run by the glass are to ... horizon glasses G and H , the dark glasses or screens I , and the sight ... glass F ; at the other end is fixed the nonius or vernier scale , used in ...
... glass only is faulty , you must say , as the seconds run by the glass are to ... horizon glasses G and H , the dark glasses or screens I , and the sight ... glass F ; at the other end is fixed the nonius or vernier scale , used in ...
Side 90
... glass F , is a plane speculum or mirror of glass , quicksilvered and set in a brass frame ; it is so placed that the face of it is perpendicular to the plane of the instrument , and is ... horizon glass 90 USE OF A QUADRANT OF REFLECTION .
... glass F , is a plane speculum or mirror of glass , quicksilvered and set in a brass frame ; it is so placed that the face of it is perpendicular to the plane of the instrument , and is ... horizon glass 90 USE OF A QUADRANT OF REFLECTION .
Side 91
... glass be perpendicular to the plane of the Quadrant . Place the index on the middle of the arch , and hold the index ... horizon glass be perpendicular to the plane of the Quadrant . Having adjusted the index glass , hold the instrument ...
... glass be perpendicular to the plane of the Quadrant . Place the index on the middle of the arch , and hold the index ... horizon glass be perpendicular to the plane of the Quadrant . Having adjusted the index glass , hold the instrument ...
Side 92
look towards the horizon through the hole in the back horizon vane L , and the transparent slit of the back horizon glass H , then if the reflected horizon , which will appear inverted , coincide with that seen direct , the glass is ...
look towards the horizon through the hole in the back horizon vane L , and the transparent slit of the back horizon glass H , then if the reflected horizon , which will appear inverted , coincide with that seen direct , the glass is ...
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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...