New American Practical NavigatorU.S. Government Printing Office, 1821 |
Inni boken
Resultat 1-5 av 34
Side ix
... tide , at many ports , harbours , & c . in the world . This table ( like the preceding ) depending wholly on observa- tions , is therefore liable to be erroneous , though great pains have been taken to make it as correct as possible ...
... tide , at many ports , harbours , & c . in the world . This table ( like the preceding ) depending wholly on observa- tions , is therefore liable to be erroneous , though great pains have been taken to make it as correct as possible ...
Side xi
... tide to low water 138 To reduce a draught to a smaller To find the latitude by the polar star 139 To find the time ... Tides 197 142 To find the time of high water by a Nautical Almanac 198 To find the time of high water by the 144 ...
... tide to low water 138 To reduce a draught to a smaller To find the latitude by the polar star 139 To find the time ... Tides 197 142 To find the time of high water by a Nautical Almanac 198 To find the time of high water by the 144 ...
Side xiii
... latitude and hori- zontal parallax Aberration of the planets in lon- Equation of second differences XLV XXXVIII Table of latitudes and longitudes XLVI Tide Table XLVII A80 160 150 140 130 Figl Semi tangents , 10 CONTENTS .
... latitude and hori- zontal parallax Aberration of the planets in lon- Equation of second differences XLV XXXVIII Table of latitudes and longitudes XLVI Tide Table XLVII A80 160 150 140 130 Figl Semi tangents , 10 CONTENTS .
Side 86
... tide expressed by an ar- row and whatever else may be thought convenient for the chart to con- tain . This chart is not to be considered as a just representation of the earth's surface for the figures of islands and countries are ...
... tide expressed by an ar- row and whatever else may be thought convenient for the chart to con- tain . This chart is not to be considered as a just representation of the earth's surface for the figures of islands and countries are ...
Andre utgaver - Vis alle
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...