## The New American Practical Navigator; Being an Epitome of Navigation; Containing All the Tables Necessary to be Used with the Nauticl Almanac |

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### Contents

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The New American Practical Navigator; Being an Epitome of Navigation ... Nathaniel Bowditch No preview available - 2015 |

### Common terms and phrases

added adjustment altitude anchor angle apparent applied base bearing cable calculated called central centre chronometer circle column compass correction corresponding cosine course declination departure diff difference of latitude difference of longitude direction Dist distance divided draw east equal error EXAMPLE extent feet figure fixed given gives glass Greenwich half height horizon land length less limb logarithm longitude lower manner marked mean measured meridian method middle miles minutes moon moon's multiplied Nautical Almanac nearly noon object observation obtained opposite parallax parallel passing perpendicular plane radius round rule sails ship ship's side sine situation star subtracted sun's Suppose Table taken tangent telescope transit triangle true turn variation wind wires

### 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.