New American Practical NavigatorU.S. Government Printing Office, 1821 |
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Side vii
... angle from 180 ° when it exceeds 90 ° . TABLE XXVIII . was calculated by proportioning the daily variation of the time of the moon's passing the meridian . TABLE XXIX . contains the correction of the moon's altitude for parallax and ...
... angle from 180 ° when it exceeds 90 ° . TABLE XXVIII . was calculated by proportioning the daily variation of the time of the moon's passing the meridian . TABLE XXIX . contains the correction of the moon's altitude for parallax and ...
Side viii
... angle + log . co - sine of error of inclina- tion . Then the difference between 2 A and the observed angle will be the tabular correction . TABLE XXXVI . contains the variation of the mean refraction ( given in Table XII . ) for various ...
... angle + log . co - sine of error of inclina- tion . Then the difference between 2 A and the observed angle will be the tabular correction . TABLE XXXVI . contains the variation of the mean refraction ( given in Table XII . ) for various ...
Side xiv
... Angle ; with an s at top Angles , < s . d Angled . or Signifies Triangle . ' s Triangles . Signifies a square . in the cuts sometimes signifies difference . the Sun. O or U. L. Upper Limb . the Moon . * a Star . L. L. Lower Limb . N. L. ...
... Angle ; with an s at top Angles , < s . d Angled . or Signifies Triangle . ' s Triangles . Signifies a square . in the cuts sometimes signifies difference . the Sun. O or U. L. Upper Limb . the Moon . * a Star . L. L. Lower Limb . N. L. ...
Side 5
... angle is usually expressed by the letter placed at the angular point , as the angle A. But when two or more angles are at the same point , it is then ne- cessary to express each by three letters , and the let- ter at the angular point ...
... angle is usually expressed by the letter placed at the angular point , as the angle A. But when two or more angles are at the same point , it is then ne- cessary to express each by three letters , and the let- ter at the angular point ...
Side 6
... angle , as RAF ; the other two angles are acute . NOTE . All triangles that are not right angled , whether they are acute or obtuse , are in general terms called oblique - angled triangles , without any other distinction . XVIII . R A ...
... angle , as RAF ; the other two angles are acute . NOTE . All triangles that are not right angled , whether they are acute or obtuse , are in general terms called oblique - angled triangles , without any other distinction . XVIII . R A ...
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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...