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 |
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Página v
... mean value given in De La Lande's Astronomy . Table XI . is a common table of proportional parts , the construction of which does not need any explanation . Table XII . contains the refraction of the heavenly bodies , calculated by Dr ...
... mean value given in De La Lande's Astronomy . Table XI . is a common table of proportional parts , the construction of which does not need any explanation . Table XII . contains the refraction of the heavenly bodies , calculated by Dr ...
Página viii
... mean refraction ( given in Table XII . ) for various temperatures and densities of the air . The correction given in this table is nearly the same as that deduced from Dr. Bradley's rule , which is as follows : As the mean height of the ...
... mean refraction ( given in Table XII . ) for various temperatures and densities of the air . The correction given in this table is nearly the same as that deduced from Dr. Bradley's rule , which is as follows : As the mean height of the ...
Página x
... mean solar time into sideral time . Table LII . To change sideral time into mean solar time . Table LIII . Variation of the compass in different parts of the world , deduced from Barlow's chart . Table LIV . contains the latitudes and ...
... mean solar time into sideral time . Table LII . To change sideral time into mean solar time . Table LIII . Variation of the compass in different parts of the world , deduced from Barlow's chart . Table LIV . contains the latitudes and ...
Página xiii
... mean time .. Second method of finding the mean time at sea ...... Third method of finding the mean time at sea . To find the time at sea by the moon's altitude . To find the time at sea by a planet's altitude .... To find the apparent ...
... mean time .. Second method of finding the mean time at sea ...... Third method of finding the mean time at sea . To find the time at sea by the moon's altitude . To find the time at sea by a planet's altitude .... To find the apparent ...
Página 45
... mean distance from the earth 95 millions of miles . MERCURY is the least of all the planets known before the discovery of Vesta , Juno , Pallas , and Ceres , and is the nearest to the sun , his mean distance from that luminary being 37 ...
... mean distance from the earth 95 millions of miles . MERCURY is the least of all the planets known before the discovery of Vesta , Juno , Pallas , and Ceres , and is the nearest to the sun , his mean distance from that luminary being 37 ...
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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.