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 pages |
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The New American Practical Navigator; Being an Epitome of Navigation ... Nathaniel Bowditch No preview available - 2015 |
Common terms and phrases
anchor angle apparent altitude azimuth cable calculation centre chronometer circle column compass Corr correct altitude corresponding Cosec cosine course degrees diameter diff difference of latitude difference of longitude Dist divided draw elapsed equal equator error EXAMPLE feet Funchal given Greenwich Half-sum heave 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 moon moon's multiplied Nautical Almanac nearly noon object observed altitude parallax parallel passing the meridian perpendicular Plane Sailing polar distance pole quadrant radius 90 refraction right ascension rope round sea account secant semidiameter sextant ship ship's side sine star subtracted sun's declination Suppose taken tangent telescope traverse table triangle true altitude true distance variation wind wires zenith distance
Popular passages
Page 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.
Page 300 - 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.
Page 158 - ... 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°...
Page 10 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Page 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...
Page 29 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Page 6 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc.
Page 121 - 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.
Page 292 - 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.
Page 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.