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 12
... intersection set the index ; then 110 ta- ken on the side which 220 was , and traced to the grad- uated edge of the index will intersect the line 80 from the side 160 was taken . 23. By fixing sights on the index the diagram be- comes a ...
... intersection set the index ; then 110 ta- ken on the side which 220 was , and traced to the grad- uated edge of the index will intersect the line 80 from the side 160 was taken . 23. By fixing sights on the index the diagram be- comes a ...
Σελίδα 16
... intersection on the rhumb- line of the course ; and which shews that the point of intersection of any two given terms is also that of the two terms sought . By well considering this important fact , learners will soon acquire a ...
... intersection on the rhumb- line of the course ; and which shews that the point of intersection of any two given terms is also that of the two terms sought . By well considering this important fact , learners will soon acquire a ...
Σελίδα 40
... intersection is called the angular point , or the summit , or vertex of the angle ; and it always rep- resents the centre of a circle . 150. The direction of the lines give the value of the angle , which is measured on the arc of a ...
... intersection is called the angular point , or the summit , or vertex of the angle ; and it always rep- resents the centre of a circle . 150. The direction of the lines give the value of the angle , which is measured on the arc of a ...
Σελίδα 43
... equator , its value is there found to be 48 , which is the length or ratio of the sine of 29 deg . to the radius of 100. The other dot- ted straight line which leads from the same point of intersection at the angle 29 deg . and to the 43.
... equator , its value is there found to be 48 , which is the length or ratio of the sine of 29 deg . to the radius of 100. The other dot- ted straight line which leads from the same point of intersection at the angle 29 deg . and to the 43.
Σελίδα 44
... intersection at the angle 29 deg . and to the side mar- ked equator represents the cosine of 29 deg . which being parallel to the side marked meridian its value is there given 87 , which is the length , or ratio of the co - sine of 29 ...
... intersection at the angle 29 deg . and to the side mar- ked equator represents the cosine of 29 deg . which being parallel to the side marked meridian its value is there given 87 , which is the length , or ratio of the co - sine of 29 ...
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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