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 by 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 ...

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E. & G.W. Blunt, 1837 - Nautical astronomy - 756 pages
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This is a masterpiece on Navigation. A must-read to everyone sailing the oceans

Selected pages

Contents

Questions to exercise the learner in plane sailing
59
is the sign of division and significs that the number that stands before it is to be divided
64
Questions to exercise the learner in parallel sailing
66
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
is the sign of equality and shows that the numbers or quantities placed before it
108
To survey a coast in sailing along shore
109
To reduce soundings taken at any time of the tide to low water
115
to front the titlepage Plate VIII to front page
116
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
67
151
To find the distance of the land in order to calculate the dip
155
Variation of the compass
158
On the dip of the magnetic needle
164
To find the time of the moons passing the meridian
170
To find the latitude by the moons meridian altitude
171
To estimate the effects of small errors in the observations
179
Second method
185
77
189
Questions to exercise the learner in working double altitudes
193
78
197
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
251
Suns right ascension 77
77
Amplitudes 73
78
Right ascensions and declinations of the fixed stars 80
80
Suns rising and setting 84
84
For finding the distance of terrestrial objects at sea 86
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 Jupiter or Saturn is observed
89
To find the correction and logarithm of a lunar observation when the sun is used
97
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 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
Correction for a planet whose horizontal parallax is 35
326
CATALOGUE OF THE TABLES with examples of the uses of those not explained in other
390
To find the horary motion of the moon
398
To calculate the moons parallax in latitude and longitude
404
To calculate the longitude of a place from the observed beginning
410
To project an eclipse of the sun
417
To calculate the beginning or end of an eclipse or occultation
425
To find the longitude of a place by the moons passage over
429
Given the right ascension and declination to find the longitude
435

Common terms and phrases

added adjustment altitude anchor angle apparent applied azimuth base bearing calculation 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 elapsed equal equator error EXAMPLE extent feet figure fixed given gives glass greater Greenwich half height horizon less limb logarithm 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 pole radius refraction right ascension rule sails secant ship ship's side sine star subtracted sun's Suppose Table taken tangent telescope transit true turn variation wind wires zenith

Bibliographic information

QR code for The New American Practical Navigator: Being an Epitome of Navigation
TitleThe 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 by Lunar Observations, and Keeping a Complete Reckoning at Sea ... the Whole Exemplified in a Journal ...
AuthorNathaniel Bowditch
Edition9
PublisherE. & G.W. Blunt, 1837
Original fromPrinceton University
DigitizedJan 23, 2009
Length756 pages
  
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