The American Practical Navigator: Being an Epitome of Navigation and Nautical AstronomyU.S. Government Printing Office, 1888 - 647 σελίδες |
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Σελίδα viii
... observe Altitudes by Cross Observations . To measure Lunar Distance , Sun To measure Lunar Distance , Star 4. The Portable Transit ... Adjustments .. Method of Observation The " Broken Backed " Transit Instrument Star Lists 5. The ...
... observe Altitudes by Cross Observations . To measure Lunar Distance , Sun To measure Lunar Distance , Star 4. The Portable Transit ... Adjustments .. Method of Observation The " Broken Backed " Transit Instrument Star Lists 5. The ...
Σελίδα ix
... OBSERVED ALTITUDE The Corrections named 245 Result of applying Corrections in order 246 Parallax .. 247 Refraction ... Observation Demonstration of the Problem .. By Single Altitude of a Star Chauvenet's Equal Altitudes . 1. Sun , A. M. ...
... OBSERVED ALTITUDE The Corrections named 245 Result of applying Corrections in order 246 Parallax .. 247 Refraction ... Observation Demonstration of the Problem .. By Single Altitude of a Star Chauvenet's Equal Altitudes . 1. Sun , A. M. ...
Σελίδα x
... Observation 300 131 301 132 302 133 303 133 304 134 305 135 306 136 Preparation of the Data .. 307 136 Computation ... Observation The Computation 2. By Time Azimuths The Observation Finding the True Azimuth Swinging Ships at Sea To ...
... Observation 300 131 301 132 302 133 303 133 304 134 305 135 306 136 Preparation of the Data .. 307 136 Computation ... Observation The Computation 2. By Time Azimuths The Observation Finding the True Azimuth Swinging Ships at Sea To ...
Σελίδα 9
... observed ) , a hair line , two shade glasses , and a concave lens for the use of observers who require spectacles . On the inner face of the support there is adjusted a small spirit - level . In use , the rays of light from the ...
... observed ) , a hair line , two shade glasses , and a concave lens for the use of observers who require spectacles . On the inner face of the support there is adjusted a small spirit - level . In use , the rays of light from the ...
Σελίδα 15
... observed when the deviations are large. Art. 58. In order to facilitate the process of reducing courses from magnetic to true and the reverse, there are several Graphic Methods; such as Napier's and Archibald Smith's. The following ...
... observed when the deviations are large. Art. 58. In order to facilitate the process of reducing courses from magnetic to true and the reverse, there are several Graphic Methods; such as Napier's and Archibald Smith's. The following ...
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Άλλες εκδόσεις - Προβολή όλων
The American Practical Navigator: Being an Epitome of Navigation and ... Nathaniel Bowditch,George Wood Logan,United States Navy Dept Bureau of Equ Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
The American Practical Navigator: Being an Epitome of Navigation and ... Nathaniel Bowditch,United States. Navy Dept. Bureau Of Equi Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2014 |
The American Practical Navigator: Being an Epitome of Navigation and ... Nathaniel Bowditch,United States Navy Dept Bureau of Navi Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Συχνά εμφανιζόμενοι όροι και φράσεις
A. M. Hour P. M. Africa altitude Australia azimuth barometer Bay of Fundy bearing Cape centre chart Chro chronometer circle column Comdr Corr correction corresponding cosec Cosine Cotangent course and distance declination deviation Diff difference of latitude difference of longitude Dist East Coast English survey equator error Extreme feet Flag-staff FULL AND CHANGE Greenwich Greenwich mean Gulf Gulf of St Harbor High Water horizon Hour A. M. Hour hour angle instrument Island Islet Latitude and Departure Lieut light Light-House List log sec Logarithms Magellan Strait MARITIME POSITIONS meridian middle latitude miles Moon's Nautical Almanac Navigator Noon North observed parallax parallel Patagonia Paumotu Paumotu or Low Plane Sailing Port refraction right ascension River scale Secant sextant ship ship's head sine South Coast star Strait Summit sun's Table Tangent telescope variation West Coast wind ΙΟ ΙΟΙ
Δημοφιλή αποσπάσματα
Σελίδα 635 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 636 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Σελίδα 142 - Irish coast a lee shore; the ship was then kept close to the wind and several tacks made to preserve her position as nearly as possible until daylight, when, nothing being in sight, she was kept on ENE under short sail with heavy gales. At about 10 am an altitude of the Sun was observed and the chronometer time noted; but, having run so far without...
Σελίδα 627 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Σελίδα 632 - 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.
Σελίδα 632 - A sphere is a solid bounded by a surface, every point of which is equally distant from a fixed point called the centre.
Σελίδα 632 - 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.
Σελίδα 133 - Greenwich mean time, beginning at noon ; the dates are therefore astronomical. All the distances that can be observed on the same day are grouped together under that date ; and the columns are read from left to right, across both pages of the same opening. The letter W., or E., is affixed to the name of the sun, plauet, or star, to indicate that it is on the west, or east, side of the moon.
Σελίδα 626 - ... the difference between this logarithm and the next greater, and multiply it by the given number exclusive of the four first figures ; cross off at the right hand of the product as many figures as you had figures of the given number to multiply by ; then add the remaining left-hand figures of this product to the logarithm taken from the table, and to the sum prefix an index equal to one lese than the number of integral figures in the given number, and you will have the sought logarithm.
Σελίδα 142 - ... altitude must have happened at all the three points and at Small's light, and at the ship, at the same instant of time ; and it followed, that Small's light must bear ENE, if the Chronometer was right. Having been convinced of this truth, the ship was kept on her course. ENE, the wind being still SE, and in less than an hour, Small's light was made bearing ENE }^E., and close aboard.