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 viii
... perpendicular to the plane of the instrument . The correction in the fifth column of this table corresponding to any angle A in the first column , may be found nearly by Hutton's logarithms , as follows : To the constant logarithm ...
... perpendicular to the plane of the instrument . The correction in the fifth column of this table corresponding to any angle A in the first column , may be found nearly by Hutton's logarithms , as follows : To the constant logarithm ...
Side 5
... perpendicular , and the other the base ; thus BC is the hypotenuse , AC the perpendicular , and AB the base ; the angles opposite the two legs are both acute . B B E H XVI . An ACUTE - ANGLED TRIANGLE has each of its angles acute , as ...
... perpendicular , and the other the base ; thus BC is the hypotenuse , AC the perpendicular , and AB the base ; the angles opposite the two legs are both acute . B B E H XVI . An ACUTE - ANGLED TRIANGLE has each of its angles acute , as ...
Side 6
... perpendicular to a diameter drawn through the other end of the same arc ; thus RS is the sine of the arc AS , RS being a line drawn from one end , S , of that arc , perpendicular to DA , which is the diameter passing through the other ...
... perpendicular to a diameter drawn through the other end of the same arc ; thus RS is the sine of the arc AS , RS being a line drawn from one end , S , of that arc , perpendicular to DA , which is the diameter passing through the other ...
Side 9
... perpendicular CD on the chord AB , it will bisect the chord in the point D. Draw the radii CA , CB ; then ( by Art . 39 ) the angle CBA = the angle CAB , and as the angles at D are right , the angle ACD must be equal to the angle BCD ...
... perpendicular CD on the chord AB , it will bisect the chord in the point D. Draw the radii CA , CB ; then ( by Art . 39 ) the angle CBA = the angle CAB , and as the angles at D are right , the angle ACD must be equal to the angle BCD ...
Side 10
... perpendicular to a chord , bisects that chord at right angles , therefore conversely a line bisecting a chord at right angles , must pass through the centre , and consequently be a diameter . XLVI . The sine of any arc is equal to half ...
... perpendicular to a chord , bisects that chord at right angles , therefore conversely a line bisecting a chord at right angles , must pass through the centre , and consequently be a diameter . XLVI . The sine of any arc is equal to half ...
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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.