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 páginas |
Dentro del libro
Resultados 1-5 de 100
Página iii
... calculation ; but when it is considered that most of those tables are useful in other calculations , where great accuracy is required , it will not be deemed an unnecessary improvement to have corrected so great a number of small errors ...
... calculation ; but when it is considered that most of those tables are useful in other calculations , where great accuracy is required , it will not be deemed an unnecessary improvement to have corrected so great a number of small errors ...
Página vi
... calculations are so obvious , that it is unnecessary to enter into any further explanation . Most of the numbers in these tables were calculated three different times . Table XX Corrections in seconds , additive . This was computed by ...
... calculations are so obvious , that it is unnecessary to enter into any further explanation . Most of the numbers in these tables were calculated three different times . Table XX Corrections in seconds , additive . This was computed by ...
Página viii
... calculating this table : Find an arc A such that Log . sine Alog . sine observed angle + log . cosine of error of inciination . Then the difference between 2 A and the observed angle will be the tabular correction . Table XXXVI ...
... calculating this table : Find an arc A such that Log . sine Alog . sine observed angle + log . cosine of error of inciination . Then the difference between 2 A and the observed angle will be the tabular correction . Table XXXVI ...
Página xii
... calculating the time of high water . Currents . Gulf stream .. Of the log - line and half - minute glass .... Description and use of a quadrant of reflection To adjust a quadrant .... To take an altitude by a fore observation ,. To take ...
... calculating the time of high water . Currents . Gulf stream .. Of the log - line and half - minute glass .... Description and use of a quadrant of reflection To adjust a quadrant .... To take an altitude by a fore observation ,. To take ...
Página xiii
... calculating double altitudes Second method ..... Third method ... Questions to exercise the learner in working double altitudes . Fourth method , when the declinations are different ..... Fifth method , to find the latitude from ...
... calculating double altitudes Second method ..... Third method ... Questions to exercise the learner in working double altitudes . Fourth method , when the declinations are different ..... Fifth method , to find the latitude from ...
Contenido
7 | |
15 | |
23 | |
30 | |
36 | |
45 | |
48 | |
58 | |
155 | |
159 | |
166 | |
208 | |
264 | |
77 | |
86 | |
97 | |
64 | |
76 | |
79 | |
86 | |
97 | |
103 | |
109 | |
115 | |
120 | |
126 | |
133 | |
137 | |
143 | |
150 | |
131 | |
148 | |
160 | |
169 | |
240 | |
246 | |
392 | |
400 | |
409 | |
415 | |
423 | |
429 | |
435 | |
443 | |
Otras ediciones - Ver todas
The New American Practical Navigator; Being an Epitome of Navigation ... Nathaniel Bowditch Sin vista previa disponible - 2015 |
Términos y frases comunes
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
Pasajes populares
Página 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.
Página 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.
Página 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°...
Página 10 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Página 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...
Página 29 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Página 6 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc.
Página 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.
Página 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.
Página 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.