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 σελίδες |
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Σελίδα v
... refraction of the heavenly bodies , calculated by Dr. Bradley's rule , supposing the refraction to be as the tangent of the apparent zenith distance of the object , decreased by three times the refraction , the horizontal refraction ...
... refraction of the heavenly bodies , calculated by Dr. Bradley's rule , supposing the refraction to be as the tangent of the apparent zenith distance of the object , decreased by three times the refraction , the horizontal refraction ...
Σελίδα vi
... refraction and 60 ' . The correction of Table XVIII . is equal to the difference between 60 ' and the correction of the sun's altitude for parallax and refraction . The correction of Table XIX . is equal to the difference between 59 ...
... refraction and 60 ' . The correction of Table XVIII . is equal to the difference between 60 ' and the correction of the sun's altitude for parallax and refraction . The correction of Table XIX . is equal to the difference between 59 ...
Σελίδα vii
... refraction , corresponding to the parallax 57 ' 30 " . Tables XXX . and XXXI . are tables of proportional parts , taken from the Requisite Tables , with a few corrections . Table XXXII . contains the variation of the altitude of any ...
... refraction , corresponding to the parallax 57 ' 30 " . Tables XXX . and XXXI . are tables of proportional parts , taken from the Requisite Tables , with a few corrections . Table XXXII . contains the variation of the altitude of any ...
Σελίδα viii
... refraction to the corrected refraction ; and as 350 , increased by the height of Fahrenheit's thermometer , is to 400 , so is the corrected to the true refraction . Table XXXVII . contains the latitudes and longitudes of the fixed stars ...
... refraction to the corrected refraction ; and as 350 , increased by the height of Fahrenheit's thermometer , is to 400 , so is the corrected to the true refraction . Table XXXVII . contains the latitudes and longitudes of the fixed stars ...
Σελίδα xii
... refraction , and dip of the horizon ............ . 150 151 153 To find the distance of the land in order to calculate the dip .. To find the sun's declination .... 155 156 Variation of the compass .. 158 To observe an amplitude or ...
... refraction , and dip of the horizon ............ . 150 151 153 To find the distance of the land in order to calculate the dip .. To find the sun's declination .... 155 156 Variation of the compass .. 158 To observe an amplitude or ...
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Άλλες εκδόσεις - Προβολή όλων
The New American Practical Navigator; Being an Epitome of Navigation ... Nathaniel Bowditch Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 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°...
Σελίδα 10 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Σελίδα 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...
Σελίδα 29 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Σελίδα 6 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.