## The New American Practical Navigator: Being an Epitome of Navigation : Containing All the Tables Necessary to be Used with the Nautical Almanac, in Determining the Latitutde, and the Longitude by Lunar Observations : and Keeping a Complete Reckoning at Sea : the Whole Exemplified in a Journal, Kept from Boston to Madeira : with an Appendix Containg Methods of Calculating Ex\clipses of the Sun and Moon, and Occultations of the Fixed Stars |

### From inside the book

Page 15

In any triangle ( supposing any side to be the base , and calling the other two the sides ) the sum of the sides

In any triangle ( supposing any side to be the base , and calling the other two the sides ) the sum of the sides

**is to their difference , as the tangent of half the sum of the**angles at the base is to the tangent of half the difference ...### What people are saying - Write a review

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The New American Practical Navigator: Being an Epitome of Navigation ... Nathaniel Bowditch No preview available - 2017 |

The New American Practical Navigator: Being an Epitome of Navigation ... Nathaniel Bowditch No preview available - 2018 |

### Common terms and phrases

added altitude anchor angle apparent applied arch base bearing cable calculated called centre co-sine column compass correction corresponding course declination departure Diff difference of latitude direction Dist distance divided draw equal equator error EXAMPLE extent fall feet figure given gives glass greater Greenwich half haul head height horizon keep Latitude and Departure length less limb logarithm longitude lower manner marked mean measured meridian method middle latitude miles minutes moon moon's multiplied Nautical Almanac nearly noon object observation obtained opposite parallax parallel passing perpendicular plane points radius refraction right ascension rope round rule sail ship ship's side sine square star subtracted sun's Suppose Table taken true turn variation watch wind

### Popular passages

Page ii - IDE, of the said District, hath deposited in this office, the title of a book, the right whereof he claims as proprietor, in the words following, to wit : " Inductive Grammar, designed for beginners.

Page 17 - In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. By Theorem II. we have a : b : : sin. A : sin. B.

Page 32 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...

Page 191 - 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 6 - The circumference of a circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, &c.

Page 205 - The cause of the tides is the unequal attraction of the sun and moon upon different parts of the earth. For they attract the parts of the earth's surface nearest to them, with a greater force than they do its centre : and attract the centre more than they do the opposite surface. To restore this equilibrium the waters take a spheroidal figure, whose longer axis is directed towards the attracting luminary.

Page 33 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor ; the remainder will be the logarithm of the quotient EXAMPLE I.

Page 6 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.

Page 243 - Broadside; a discharge of all the guns on one side of a ship, both above and below.

Page 204 - ... near the longitude of Sumatra and Java. In the tract between Sumatra and the African coast, and from 3° of south latitude, quite northward to the Asiatic coast, including the Arabian Sea and the Bay of Bengal, the monsoons blow from October to April on the NE and from April to October on the SW In the former half year, the wind is more steady and gentle, and the weather clearer than in the latter six months. In the Red Sea the winds blow nearly nine months of the year from the southward, that...