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 : Illustrated by Proper Rules and Examples ...

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E. & G.W. Blunt, 1864 - Nautical astronomy - 749 pages
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Contents

Explanations of the terms used in astronomy and geography
47
Examples in geography
48
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
To find the time of high water by a Nautical Almanac
121
Description and use of a quadrant of reflection
128
To adjust a sextant
134
Adjustments of a circle of reflection
138
Description and use of a portable transit instrument
145
Tables for correcting the adjustments of a transit instrument
151
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
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
General remarks on the taking of a lunar observation
228
Fourth method or Witchells improved method of finding the true distance
243
To calculate a planets altitude
249
To allow for the change of rate in a chronometer
259
Jeurnal from Boston to Madeira
270
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 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
CATALOGUE OF THE TABLES with examples of the uses of those not explained in other
385
APPENDIX
395
To find the ecliptic conjunction or opposition of the moon and sun
401
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
427
To find the longitude of a place by the moons passage over
434
Theorems in spherics
440
To find the longitude of a place from the beginning or end of an occul
446

Common terms and phrases

added adjusted altitude angle apparent applied 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 Light 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 proportional radius reach refraction right ascension rule Sailing secant ship side sine star subtracted sun's Suppose Table taken tangent telescope transit triangle true variation wind wires zenith

Bibliographic information

QR code for The New American Practical Navigator
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 : Illustrated by Proper Rules and Examples ...
AuthorJonathan Ingersoll Bowditch
Edition32, reprint
PublisherE. & G.W. Blunt, 1864
Original fromPrinceton University
DigitizedJan 23, 2009
Length749 pages
  
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