The New American Practical Navigator: Being an Epitome of Navigation ...

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E. & G.W. Blunt, 1852 - Nautical astronomy - 777 pages
 

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Contents

A short introduction to astronomy and geography
45
Examples in geography
48
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
To work a compound course by middle latitude or Mercators sailing
89
Mensuration
99
Surveying
106
Of winds
117
To find the time of high water by the tables C and D
124
Description and uses of the circle of reflection
137
On parallax refraction and dip of the horizon
153
Variation of the compass
158
To find the latitude by the moons meridian altitude
171
To estimate the effects of small errors in the observations
179
Catalogue of THE TABLES with examples of the uses of those not explained in other
182
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 time at sea and regulate a watch
208
To find the time at sea by a planets altitude
215
To regulate a chronometer by means of a transit instrument
221
APPENDIX
225
General remarks on the taking of a lunar observation
228
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
Difference for degrees 17
17
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 variation 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
364
336
ANDAMAN
369
Addition and subtraction using the signs as in algebra
397
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
442

Common terms and phrases

anchor apparent altitude azimuth bearing 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 elapsed equal equator error EXAMPLE feet fore observation 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 place of observation 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 transit triangle true altitude true distance true longitude variation wind wires zenith distance

Bibliographic information

TitleThe New American Practical Navigator: Being an Epitome of Navigation ...
AuthorNathaniel Bowditch
Edition21
PublisherE. & G.W. Blunt, 1852
Original fromthe New York Public Library
DigitizedJul 17, 2009
Length777 pages
  
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