The New American Practical Navigator; Being an Epitome of Navigation; Containing All the Tables Necessary to be Used with the Nauticl AlmanacE. & G.W. Blunt, 1846 - 451 sider |
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Side vii
... noon , for various degrees of latitude and declina- tion . The following method was used in constructing the table : A and B were calculated for each degree of declination by these formulas ; Log . A = log . 1 " .96349 + 2 log . cos ...
... noon , for various degrees of latitude and declina- tion . The following method was used in constructing the table : A and B were calculated for each degree of declination by these formulas ; Log . A = log . 1 " .96349 + 2 log . cos ...
Side xiii
... noon by a sextant or circle ....... To find the latitude on shore by means of an artificial horizon .. To find the latitude by the polar star To find the time at sea , and regulate a watch .... Examples to exercise the learner in ...
... noon by a sextant or circle ....... To find the latitude on shore by means of an artificial horizon .. To find the latitude by the polar star To find the time at sea , and regulate a watch .... Examples to exercise the learner in ...
Side xiv
... noon XXXIII . To reduce the numbers of Table XXXII . to other given intervals from 239 noon ..... 243 surfaces of the central mirror ..... XXXIV . Errors arising from a deviation of one minute in the parallelism of the 244 ...... XXXV ...
... noon XXXIII . To reduce the numbers of Table XXXII . to other given intervals from 239 noon ..... 243 surfaces of the central mirror ..... XXXIV . Errors arising from a deviation of one minute in the parallelism of the 244 ...... XXXV ...
Side 48
... noon , or mid - day . The azimuth of a heavenly body is its distance on the horizon , when referred to it by a secondary , from the north or south points . The amplitude is its distance from the east or west points , at the time of ...
... noon , or mid - day . The azimuth of a heavenly body is its distance on the horizon , when referred to it by a secondary , from the north or south points . The amplitude is its distance from the east or west points , at the time of ...
Side 48
... noon to the sun's right ascension . The ascensional difference of any object is the difference between the right ascension of the object and that point of the equator which rises or sets with it . The declination of a star or any ...
... noon to the sun's right ascension . The ascensional difference of any object is the difference between the right ascension of the object and that point of the equator which rises or sets with it . The declination of a star or any ...
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The New American Practical Navigator; Being an Epitome of Navigation ... Nathaniel Bowditch Ingen forhåndsvisning tilgjengelig - 2015 |
Vanlige uttrykk og setninger
anchor apparent altitude azimuth bearing cable calculation central index centre chord chronometer circle column compass Corr correct central altitude corresponding Cosec cosine degrees diameter diff difference of latitude difference of longitude Dist divided draw elapsed equal equator error EXAMPLE feet given Greenwich Half-sum horizon glass horizontal parallax hour angle hypotenuse instrument latitude and departure line of numbers line of sines logarithm lower limb mast mean meridian altitude method middle latitude miles minutes moon moon's multiplied Nautical Almanac nearly noon object observed altitude obtained parallel Parallel Sailing passing the meridian perpendicular Plane Sailing points polar distance pole quadrant radius 90 refraction right ascension rule screw sea account secant semidiameter sextant ship ship's side star subtracted sun's declination Suppose taken tangent telescope triangle true altitude true distance true longitude variation wind wires zenith distance
Populære avsnitt
Side 9 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Side 299 - Calm Light air Light breeze Gentle breeze Moderate breeze Fresh breeze Strong breeze Moderate gale Fresh gale Strong gale Whole gale Storm Estimatin Observations at sea Sea like mirror.
Side 156 - ... 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 10 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Side 102 - 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...
Side 29 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Side 6 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc.
Side 119 - Fiini will be the time of high water, at the given place, reckoning from the noon of the given day. If this sum be greater than 12h.
Side 290 - Davit ; a long beam of timber, used as a crane, whereby to hoist the flukes of the anchor to the top of the bow, without injuring the planks of the ship's sides as it ascends.
Side 11 - KCML, the sum of the two parallelograms or square BCMH ; therefore the sum of the squares on AB and AC is equal to the square on BC.