New American Practical NavigatorU.S. Government Printing Office, 1821 |
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Side vi
... degrees , is the same as in other works of this kind . TABLE XXII . contains the proportional logarithms for three hours . The numbers of this table may be found by subtracting the logarithm of the time in seconds from the log . of ...
... degrees , is the same as in other works of this kind . TABLE XXII . contains the proportional logarithms for three hours . The numbers of this table may be found by subtracting the logarithm of the time in seconds from the log . of ...
Side vii
... degrees of latitude and declination . The following method was used in constructing the ta- ble : -A and B were calculated for each degree of declination by these formulæ . Log . A = Log . 1 " .96349 + 2 log . cos . declination ...
... degrees of latitude and declination . The following method was used in constructing the ta- ble : -A and B were calculated for each degree of declination by these formulæ . Log . A = Log . 1 " .96349 + 2 log . cos . declination ...
Side x
... degree and minute 77 Table of solutions of the various cases of Mercator's sailing To work a compound course by mid ... degrees , minutes , and se- conds corresponding to any log . sine , To measure the angular distance of the sun from ...
... degree and minute 77 Table of solutions of the various cases of Mercator's sailing To work a compound course by mid ... degrees , minutes , and se- conds corresponding to any log . sine , To measure the angular distance of the sun from ...
Side xii
... degrees and minutes into VI time , and the contrary VII Proportional logarithms XI Logarithms of numbers XII Logarithmic sines , tangents , and se- XIV To find the time of the moon's pass- XV Correction of the moon's altitude for SIGNS ...
... degrees and minutes into VI time , and the contrary VII Proportional logarithms XI Logarithms of numbers XII Logarithmic sines , tangents , and se- XIV To find the time of the moon's pass- XV Correction of the moon's altitude for SIGNS ...
Side xiv
... degrees ; thus , 45 ° represents 45 degrees . Signifies minutes ; thus , 24 ' or 24 minutes . " Signifies seconds ; thus , 44 " , or 44 seconds . " !! Signifies thirds or sixtieth parts of seconds ; thus , 44 " , or 44 thirds . S ...
... degrees ; thus , 45 ° represents 45 degrees . Signifies minutes ; thus , 24 ' or 24 minutes . " Signifies seconds ; thus , 44 " , or 44 seconds . " !! Signifies thirds or sixtieth parts of seconds ; thus , 44 " , or 44 thirds . S ...
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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...