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 Latitude, and the Longitude Y Lunar Observations, and Keeping a Complete Reckoning at Sea ... the Whole Exemplified in a Journal, Kept from Boston to Madeira ... with an Appendix, Containing Methods of Calculating Eclipses of the Sun and Moon, and Occultations of the Fixed Stars

Nathaniel Bowditch

E. & G. W. Blunt, 1859 - Nautical astronomy

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Selected pages

Surinam	xix

SIGNS and abbreviations used in this work	xx

Demonstration of the most useful propositions of geometry 7	13

Construction of the plane scale	18

Description and use of the sector	25

Division by logarithms	31

Table Page	34

Table of solutions of the various cases of trigonometry	37

Difference for degrees 17	17

Meridional parts 62	62

Suns declination IV A Equation of time	66

For reducing the suns declination 72	72

Suns right ascension 77	77

Amplitudes 78	78

Right ascensions and declinations of the fixed stars 80	80

Suns rising and setting 84	84

A short introduction to astronomy and geography	45

Examples in geography	51

Difference of latitude and departure for points 1	52

Questions to exercise the learner in plane sailing	58

A table showing how many miles of meridian distance correspond to a degree of longi	64

Table to correct the middle latitude	76

Table of solutions of the various cases of Mercators sailing	79

To work a compound course by middle latitude or Mercators sailing	86

To find the difference between the true and apparent directions of the wind	97

Gauging	103

To survey a coast in sailing along shore	109

To reduce soundings taken at any time of the tide to low water	115

Tides	120

Of the logline and halfminute glass	126

Description and use of a sextant of reflection	133

Verification of the mirrors and colored glasses	137

Verification of the mirrors and colored glasses	143

To observe the transit of any heavenly body over the meridian	150

To find the distance of the land in order to calculate the dip	155

To calculate the true amplitude	159

To find the latitude by a meridian altitude of the sun or a fixed star	166

To find the latitude by the moons meridian altitude	171

To estimate the effects of small errors in the observations	179

Second method	185

Questions to exercise the learner in working double altitudes	193

To find the latitude by one altitude of the sun having your watch previously regulated	200

To find the latitude by the polar star	206

To find the time at sea by the moons altitude	213

To regulate a chronometer by equal altitudes of the sun	219

To find the longitude at sea by lunar observations	225

Examples of lunar observations	232

Second method of working a lunar observation	239

Table of corrections for second differences	245

Method of combining several lunar observations and determining the error of the chro	251

To allow for the change of rate in a chronometer	257

To correct the dead reckoning	263

Explanations of sea terms	288

Evolutions at sea	304

For finding the distance of terrestrial objects at sea 8	86

Proportional parts 87	87

Refraction of the heavenly bodies 88	88

To find the correction and logarithm of a lunar observation when a star or either of the planets Venus Mars Jupiter or Saturn is observed 89	89

To find the correction and logarithm of a lunar observation when the sun is used 97	97

To find the correction and logarithm of a lunar observation depending on the moons altitude 98	98

For finding the third correction of a lunar observation 130	130

For turning degrees and minutes into time and the contrary 131	131

Proportional logarithms 132	132

For finding the latitude by two altitudes of the sun 148	148

Natural sines and cosines 160	160

Log sines tangents c to points and quarter points 169	169

To find the time of the moons passing the meridian 230	230

To find the on of the moons declination c 231	231

To find the suns right ascension 237	237

Variation of the suns altitude in one minute from noon 239	239

To reduce the numbers of Table XXXII to other given intervals from noon 243	243

Errors arising from a deviation of one minute in the parallelism of the surfaces of the central mirror 244	244

Longitudes and latitudes of the fixed stars 245	245

Reductions of latitude and horizontal parallax 246	246

Aberration of the fixed stars in right ascension and declination 247	247

Nutation in right ascension and declination 248	248

Augmentation of the moons semidiameter found by the nonagesimal 249	249

change of 100 seconds in its declination 251	251

Third correction in Lyonss improved method 275	275

ANAMBAS ISLANDS	356

ANDAMAN 66	362

APO BANK	369

ARABIA coast	380

CATALOGUE OF THE TABLES with examples of the uses of those not explained in other	392

To find the horary motion of the moon	400

To calculate the longitude of a place from the observed beginning	409

To project an eclipse of the moon	415

To project an occultation of a fixed star	423

To find the longitude of a place by measuring the distance of the moon	429

Given the right ascension and declination to find the longitude	435

To find the longitude of a place from the beginning or end of a solar	443

Copyright

Other editions - View all

The New American Practical Navigator: Being an Epitome of Navigation ...
Nathaniel Bowditch
Full view - 1847

The New American Practical Navigator: Being an Epitome of Navigation ...
Nathaniel Bowditch
Full view - 1844

The New American Practical Navigator: Being an Epitome of Navigation ...
Nathaniel Bowditch
Full view - 1845

Common terms and phrases

anchor apparent altitude azimuth cable calculation Cape central index centre chronometer circle column compass Corr correct altitude correct central altitude corresponding Cosec cosine degrees diameter Diff difference of latitude difference of longitude Dist draw east elapsed equal equator error EXAMPLE feet Funchal given Greenwich Half-sum horizon glass horizontal parallax hour angle hypotenuse instrument latitude and departure line of numbers logarithm mean meridian altitude meridional difference 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 sine star subtracted sun's declination Suppose taken tangent telescope traverse table triangle true altitude true distance true longitude variation wind wires zenith distance

Bibliographic information

Title	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 Latitude, and the Longitude Y Lunar Observations, and Keeping a Complete Reckoning at Sea ... the Whole Exemplified in a Journal ...
Author	Nathaniel Bowditch
Contributor	United States. Bureau of Naval Personnel
Publisher	E. & G. W. Blunt, 1859
Original from	University of Minnesota
Digitized	3 Apr 2012

Export Citation	BiBTeX EndNote RefMan

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