Description and Use of a Diagram of Navigation: By which All Problems in Plane, Traverse, Parallel, Middle Latitude and Mercator's Sailing May be Instantly and Accurately Resolved. Adapted to the Capacity of All who Know the Use of Figures. Designed as an Easy Introduction, by Sensible Demonstration, to the Principles, and the Practice of Navigation. With a Diagram EngravedFellowes & Simpson, 1822 - 4 σελίδες |
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Σελίδα 10
... centre angle of the Diagram is fitted a moveable INDEX ; one edge of which ( that which coin- cides with the pivot on which it moves ) is graduated to the equal parts of the sides . 12. From the centre angle to the arc are drawn rhumb ...
... centre angle of the Diagram is fitted a moveable INDEX ; one edge of which ( that which coin- cides with the pivot on which it moves ) is graduated to the equal parts of the sides . 12. From the centre angle to the arc are drawn rhumb ...
Σελίδα 19
... 13 take 130 and the subdivisions will be tenths . The operations should always be made as far from the centre angle as may be convenient . 72. The distance between any two meridians contin- ually decreases 19 Parallel Sailing.
... 13 take 130 and the subdivisions will be tenths . The operations should always be made as far from the centre angle as may be convenient . 72. The distance between any two meridians contin- ually decreases 19 Parallel Sailing.
Σελίδα 40
... centre of a circle . 150. The direction of the lines give the value of the angle , which is measured on the arc of a circle des- cribed about the angular point . 151. If two right lines cross each other in any direc- tion , four angles ...
... centre of a circle . 150. The direction of the lines give the value of the angle , which is measured on the arc of a circle des- cribed about the angular point . 151. If two right lines cross each other in any direc- tion , four angles ...
Σελίδα 41
... centre to the circumference ; and is half the diameter . 165. The DIAMETER of a circle is a right line drawn from one point in the circumference to the opposite * Deparcieux . 6 . point through the centre , and is equal to twice.
... centre to the circumference ; and is half the diameter . 165. The DIAMETER of a circle is a right line drawn from one point in the circumference to the opposite * Deparcieux . 6 . point through the centre , and is equal to twice.
Σελίδα 42
... centre , and is equal to twice the radius . 166. An ARC is any portion of the circumference , and is the measure of the angle comprised by two radii , drawn from the centre , one to each extremity of the arc . 167. The COMPLEMENT of an ...
... centre , and is equal to twice the radius . 166. An ARC is any portion of the circumference , and is the measure of the angle comprised by two radii , drawn from the centre , one to each extremity of the arc . 167. The COMPLEMENT of an ...
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arc of latitude arc or angle chord circle circumference co-sine co-tangent contiguous angle course 3 points course 3 pts course 38 deg COURSE and DEPARTURE Course and Diff course and distance course sailed curve line departure 84 Diagram of Navigation difference of lati difference of latitude difference of longitude direct course dist DISTANCE and DEPARTURE distance sailed ence of longitude Example Example.-A ship sails find the COURSE find the DISTANCE give the course give the diff give the distance Given both LATITUDES Given-one LATITUDE index remaining index set index to meet meet the difference Mercator's sailing merid meridian distance meridional difference middle lat parallel sailing plane sailing proper diff radius be equal required the course right line drawn right-angled plane triangle Rule Rule.-Set the index secant Set the index ship in lat side as radius side marked equator tance tangent traverse table tude