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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Results 1-5 of 75
Page 104
... heads . Having these dimensions , you may calcu late the content , in gallons or bushels , by the following rule : - RULE . Take the difference between the head and bung diameters ; multiply this by 0.62 , and add the product to the head ...
... heads . Having these dimensions , you may calcu late the content , in gallons or bushels , by the following rule : - RULE . Take the difference between the head and bung diameters ; multiply this by 0.62 , and add the product to the head ...
Page 105
... head and bung diameters to a number to the left hand , which is to be added to the head diameter to get the mean diameter ; then put one foot of the compasses upon the gauge point ( which is 17.15 for wine gallons , 18.95 for ale ...
... head and bung diameters to a number to the left hand , which is to be added to the head diameter to get the mean diameter ; then put one foot of the compasses upon the gauge point ( which is 17.15 for wine gallons , 18.95 for ale ...
Page 110
... head and that part of the ship which is at the same height as the eye of the observer ; for by this angle the distance of the boat from the ship Bearing of C from A , S. 36 ° W. may be determined , as will be explained hereafter . 110 ...
... head and that part of the ship which is at the same height as the eye of the observer ; for by this angle the distance of the boat from the ship Bearing of C from A , S. 36 ° W. may be determined , as will be explained hereafter . 110 ...
Page 126
... head sea . This practice of measuring a ship's rate of sailing , is founded upon the following principle that the length of each knot is the same part of a sea mile , as half a minute is of an hour . Therefore the length of a knot ought ...
... head sea . This practice of measuring a ship's rate of sailing , is founded upon the following principle that the length of each knot is the same part of a sea mile , as half a minute is of an hour . Therefore the length of a knot ought ...
Page 134
... head , containing a plate , in which there are three colored glasses , and a part that is open , sometimes accompanies the sextant ; this head is to be screwed on the eye end of the tube , or on that of either telescope . The edge of ...
... head , containing a plate , in which there are three colored glasses , and a part that is open , sometimes accompanies the sextant ; this head is to be screwed on the eye end of the tube , or on that of either telescope . The edge of ...
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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 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
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 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.
Page 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°...
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 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.
Page 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.
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.