The Practice of Navigation: And Nautical AstronomyJ. D. Potter, 1882 - 910 σελίδες |
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Αποτελέσματα 1 - 5 από τα 87.
Σελίδα 18
... wide , to cover a surface ; how many yards will it take at of a yard in width ? ( 1. ) 54 yds . at wide is 3 × 54 , or 162 yds . at wide , or 40'5 yds . at 1 yd . wide . This is 5 × 405 or 202-5 yds . at wide , and of this , or 50 62 yds .
... wide , to cover a surface ; how many yards will it take at of a yard in width ? ( 1. ) 54 yds . at wide is 3 × 54 , or 162 yds . at wide , or 40'5 yds . at 1 yd . wide . This is 5 × 405 or 202-5 yds . at wide , and of this , or 50 62 yds .
Σελίδα 24
... side A C , opposite the right angle is called the hypothenuse ; one of the other sides , as BC , is called the base ; and the third side , A B , the perpendicular . B C 90. A SPHERE , or GLOBE , is a solid figure bounded by a curve ...
... side A C , opposite the right angle is called the hypothenuse ; one of the other sides , as BC , is called the base ; and the third side , A B , the perpendicular . B C 90. A SPHERE , or GLOBE , is a solid figure bounded by a curve ...
Σελίδα 30
... side four · or five different scales for different measures , on each side of which one division is subdivided into 10 equal parts . 105. In the diagonal scale , the shorter lines dividing the length into equal portions ( units ) are ...
... side four · or five different scales for different measures , on each side of which one division is subdivided into 10 equal parts . 105. In the diagonal scale , the shorter lines dividing the length into equal portions ( units ) are ...
Σελίδα 33
... sides of the one , as A B , A C , equal to two sides of the other , as DE , D F , and have likewise the angles A , D ... side common Hence they are equal , and the angles ACI , I C B being equal , each is half of A C B. D 118. If two ...
... sides of the one , as A B , A C , equal to two sides of the other , as DE , D F , and have likewise the angles A , D ... side common Hence they are equal , and the angles ACI , I C B being equal , each is half of A C B. D 118. If two ...
Σελίδα 34
... side B A will fall on ED ; and because the angles C and F are equal , the side CA will fall on F D. Hence , as the point A belongs to both the sides BA and CA , and D to ED and FD , the point A will coincide with D , and the angles A ...
... side B A will fall on ED ; and because the angles C and F are equal , the side CA will fall on F D. Hence , as the point A belongs to both the sides BA and CA , and D to ED and FD , the point A will coincide with D , and the angles A ...
Άλλες εκδόσεις - Προβολή όλων
The Practice of Navigation and Nautical Astronomy Henry Raper Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
The Practice of Navigation and Nautical Astronomy (Classic Reprint) Henry Raper Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
The Practice of Navigation and Nautical Astronomy Henry Raper Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 37 - ... the three interior angles of' a triangle are together equal to two right angles.
Σελίδα 39 - Hence it is plain that triangles on the same or equal bases, and between the same parallels, are equal, seeing (by cor.
Σελίδα 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.