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 vi
... turning time into 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 ...
... turning time into 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 ...
Página xiv
... turning degrees and minutes into time , and the contrary 130 131 132 XXIII . For finding the latitude by two altitudes of the sun . 148 XXIV . Natural sines and cosines .... 160 XXV . Log . sines , tangents , & c . to points and quarter ...
... turning degrees and minutes into time , and the contrary 130 131 132 XXIII . For finding the latitude by two altitudes of the sun . 148 XXIV . Natural sines and cosines .... 160 XXV . Log . sines , tangents , & c . to points and quarter ...
Página 45
... turns round its axis in 254 days . Its diameter is 883,000 English miles , and its 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 ...
... turns round its axis in 254 days . Its diameter is 883,000 English miles , and its 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 ...
Página 48
... turning freely on a pivot or any thing to support it . Thus all the points of the card will be directed towards their corresponding points of the horizon ; consequently , by help of the compass , a ship may be kept in any proposed track ...
... turning freely on a pivot or any thing to support it . Thus all the points of the card will be directed towards their corresponding points of the horizon ; consequently , by help of the compass , a ship may be kept in any proposed track ...
Página 126
... Turn ; the glass - holder answers , Done ; and , watching the glass , the moment it is run out , says , Stop . The reel being immediately stopped , the last mark run off shows the number of knots , and the distance of that mark from the ...
... Turn ; the glass - holder answers , Done ; and , watching the glass , the moment it is run out , says , Stop . The reel being immediately stopped , the last mark run off shows the number of knots , and the distance of that mark from the ...
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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.