The Practice of Navigation: And Nautical AstronomyJ. D. Potter, 1882 - 910 sider |
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Side
... Interval 1h m m m m m m m m m m 0 10 20 30 40 50 0 10 20 30 о 8 145 205 24 28 315 34 35 35 8 9 9 15 21 26 30 32 36 ... Interval լի m m m m m מון m m m n 0 50 40 30 20 10 0 50 40 30 3h 2h Interval Ih The practice of navigation and ...
... Interval 1h m m m m m m m m m m 0 10 20 30 40 50 0 10 20 30 о 8 145 205 24 28 315 34 35 35 8 9 9 15 21 26 30 32 36 ... Interval լի m m m m m מון m m m n 0 50 40 30 20 10 0 50 40 30 3h 2h Interval Ih The practice of navigation and ...
Side 14
... interval of time , and not continuously , like a pump , or so much per hour ; the reduction , therefore , to hourly rate , is not correct , but it is near enough for forming a tolerable estimate , which , in practice , is all that is ...
... interval of time , and not continuously , like a pump , or so much per hour ; the reduction , therefore , to hourly rate , is not correct , but it is near enough for forming a tolerable estimate , which , in practice , is all that is ...
Side 64
... intervals of time , or a watch shewing seconds , gives the velocity or rate of the ship , and thence the distance run in any interval of time . I. THE COMPASS . 213. The Mariner's Compass consists of a circular card , of which the edge ...
... intervals of time , or a watch shewing seconds , gives the velocity or rate of the ship , and thence the distance run in any interval of time . I. THE COMPASS . 213. The Mariner's Compass consists of a circular card , of which the edge ...
Side 87
... interval ) , as 5 knots . B then is the place of the ship at the end of this interval . The distance , A P of the port , being very great , as compared with A B , a circle B D , described from P as a centre , is nearly a right line ...
... interval ) , as 5 knots . B then is the place of the ship at the end of this interval . The distance , A P of the port , being very great , as compared with A B , a circle B D , described from P as a centre , is nearly a right line ...
Side 90
... interval of time , we have used the word drift in the latter sense only . Thus the terms set and drift are used in speaking of the current as course and distance are in speaking of the ship .. ascertained , the rate is found by dividing ...
... interval of time , we have used the word drift in the latter sense only . Thus the terms set and drift are used in speaking of the current as course and distance are in speaking of the ship .. ascertained , the rate is found by dividing ...
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 called celestial body centre chart chron chronometer circle compass Computation corr correction cosec Course and Distance D.Lat decimal decl declination deviation diff difference direction Dist divided employed equal equator error exceeds feet find the Course fraction given gives greater height of eye Hence horizon hour-angle interval latitude less logarithms longitude magnetic magnetic bearing mean measured meridian method miles moon moon's multiplied Nautical Almanac nearly noon observation parallax parallel Parallel Sailing Plane Sailing pole prime vertical prop quantity radius ratio reckoned reduce refraction result rhumb line right angles Right Ascension sailing Semid sextant shews ship ship's head side sine star subtract 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.