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
... half and quarter points . 9. The Arc is also divided into ninety degrees ; which are numbered at every division of five degrees , from left to right , and also from right to left ; and each degree is subdivided into tenths . 10. The Arc ...
... half and quarter points . 9. The Arc is also divided into ninety degrees ; which are numbered at every division of five degrees , from left to right , and also from right to left ; and each degree is subdivided into tenths . 10. The Arc ...
Σελίδα 17
... index set to meet the distance 212 with the diff . of lat . 187 will be on the course 2 points ( or s . s . w . half w . ) and will give the line to the equator 100 for the departure . 3 3 CASE 5 . 68. Given the DISTANCE and DEPARTURE 17.
... index set to meet the distance 212 with the diff . of lat . 187 will be on the course 2 points ( or s . s . w . half w . ) and will give the line to the equator 100 for the departure . 3 3 CASE 5 . 68. Given the DISTANCE and DEPARTURE 17.
Σελίδα 19
... half E. 17 , S. by W. quarter W. 33 ; required the direct course . and distance . * TRAVERSE TABLE . DIFF . LAT . DEPARTURE . COURSES . DIS . N. S. E. W. N. 2 pts . E. 13 * 12 0 0 0 50 0 0 N. 6 pts . W. 13 5 0 00 0 0 12 0 N. 4 pts . E ...
... half E. 17 , S. by W. quarter W. 33 ; required the direct course . and distance . * TRAVERSE TABLE . DIFF . LAT . DEPARTURE . COURSES . DIS . N. S. E. W. N. 2 pts . E. 13 * 12 0 0 0 50 0 0 N. 6 pts . W. 13 5 0 00 0 0 12 0 N. 4 pts . E ...
Σελίδα 22
... half sum of the two latitudes , when they are both on the same side of the equator ; but when the latitudes are on each side of the equator , it is half the difference of the two lati- tudes . 82. There are seven cases ; and in which ...
... half sum of the two latitudes , when they are both on the same side of the equator ; but when the latitudes are on each side of the equator , it is half the difference of the two lati- tudes . 82. There are seven cases ; and in which ...
Σελίδα 41
... 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.
... 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.
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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