The Practice of Navigation: And Nautical AstronomyJ. D. Potter, 1882 - 910 sider |
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Side xvii
... PARALLEL SAILING , WITH MIDDLE LATitude , and MERCATOR'S SAILINGS 95 III . GREAT CIRCLE SAILING 105 IV . TAKING Departures . 114 I. BY A SINGLe Bearing and Distance 114 II . DETERMINATION OF DISTANCE 114 III . METHODS BY THE CHART ...
... PARALLEL SAILING , WITH MIDDLE LATitude , and MERCATOR'S SAILINGS 95 III . GREAT CIRCLE SAILING 105 IV . TAKING Departures . 114 I. BY A SINGLe Bearing and Distance 114 II . DETERMINATION OF DISTANCE 114 III . METHODS BY THE CHART ...
Side 21
... GEOMETRY is the name of that science which relates to the measures of space . A PROBLEM is something required to be done . PARALLEL LINES are lines so placed that the shortest distance PRACTICAL GEOMETRY . 21 PRACTICAL GEOMETRY.
... GEOMETRY is the name of that science which relates to the measures of space . A PROBLEM is something required to be done . PARALLEL LINES are lines so placed that the shortest distance PRACTICAL GEOMETRY . 21 PRACTICAL GEOMETRY.
Side 22
And Nautical Astronomy Henry Raper. PARALLEL LINES are lines so placed that the shortest distance between them is every where the same , as A B , CD . Such lines evidently never meet . A C B D 74. A CIRCLE is a figure bounded by a curve ...
And Nautical Astronomy Henry Raper. PARALLEL LINES are lines so placed that the shortest distance between them is every where the same , as A B , CD . Such lines evidently never meet . A C B D 74. A CIRCLE is a figure bounded by a curve ...
Side 24
... parallel rulers are convenient . These may be of the common form , which needs no description here , or those called ... parallel to themselves . This parallel motion is perfect , which is not always the case with the common parallel ...
... parallel rulers are convenient . These may be of the common form , which needs no description here , or those called ... parallel to themselves . This parallel motion is perfect , which is not always the case with the common parallel ...
Side 25
... parallel to another line . C is the given point , A B is the line . Take the shortest distance from C to A B in the compasses ; set one foot on A B as at B , and describe a small arc ; then the line drawn through C , so as to touch this ...
... parallel to another line . C is the given point , A B is the line . Take the shortest distance from C to A B in the compasses ; set one foot on A B as at B , and describe a small arc ; then the line drawn through C , so as to touch this ...
Andre utgaver - Vis alle
The Practice of Navigation and Nautical Astronomy Henry Raper Ingen forhåndsvisning tilgjengelig - 2018 |
The Practice of Navigation and Nautical Astronomy (Classic Reprint) Henry Raper Ingen forhåndsvisning tilgjengelig - 2017 |
The Practice of Navigation and Nautical Astronomy Henry Raper Ingen forhåndsvisning tilgjengelig - 2018 |
Vanlige uttrykk og setninger
add the log altitude alts appears azim azimuth bearing celestial body centre chron chronometer circle compass Computation corr correction cosec D.Lat Dist decimal decl declination deviation diff difference direction divided employed equal equator error exceeds extr feet given gives greater Greenwich Date height of eye Hence horizon hour-angle interval latitude less logarithms longitude lunar magnetic mean measured meridian method miles moon moon's Nautical Almanac nearly noon observation parallax parallel Parallel Sailing Plane Sailing pole port prime vertical prop quantity reckoned reduce refraction result rhumb line Right Ascension sailing Semid sextant shews ship ship's side sine star subtract sum rejecting tens sun's TRAVERSE TABLE triangle true true alt variation watch
Populære avsnitt
Side 41 - 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.
Side 19 - The characteristic of a number less than 1 is found by subtracting from 9 the number of ciphers between the decimal point and the first significant digit, and writing — 10 after the result.
Side 38 - A parallelogram is a four.sided figure, of which the opposite sides are parallel; and the diameter is the straight line joining two of its opposite angles.
Side vii - This is the more important, as very indistinct and erroneous notions prevail among practical persons on the subject of accuracy of computation ; and much time is, in consequence, often lost in computing to a degree of precision wholly inconsistent with that of the elements themselves. The mere habit of working invariably to a useless precision, while it can never advance the computer's knowledge of the subject, has the unfavourable tendency of deceiving those who are not aware of the true nature...
Side 147 - For the same body the semidiameter varies with the distance; thus, the difference of the sun's semidiameter at different times of the year is due to the change of the earth's distance from the sun; and similarly for the moon and the planets.
Side 22 - A CIRCLE is a figure bounded by a curve line called the circumference,* of which every point is at the same distance from a point within, called the centre. Thus, ABD is a circle, and C the centre.
Side 43 - ... section shall be parallel to the remaining side of the triangle. Let DE be drawn parallel to BC, one of the sides of the triangle ABC: then BD shall be to DA, as CE to EA. Join BE, CD; then the triangle BDE is equal...
Side 37 - ... the three interior angles of' a triangle are together equal to two right angles.
Side 39 - Hence it is plain that triangles on the same or equal bases, and between the same parallels, are equal, seeing (by cor.
Side 105 - The distance between two points on the surface of a sphere is the length of the minor arc of a great circle between them.