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 5
... set the index on 60 ° of latitude , and any number traced from the equator will be doub- led on the index - according to the theorem that the secant of 60 ° is equal to twice the radius ; from which is this rule , Rad .: mer . dist ...
... set the index on 60 ° of latitude , and any number traced from the equator will be doub- led on the index - according to the theorem that the secant of 60 ° is equal to twice the radius ; from which is this rule , Rad .: mer . dist ...
Σελίδα 12
... 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 convenient ...
... 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 convenient ...
Σελίδα 16
... index set on the course 3 points , 243 the distance taken on the index , intersects the line to the meridian 202 for difference of latitude , and the line to the equator 135 for departure . Example - A ship sails S. 30 deg . W. 164 ...
... index set on the course 3 points , 243 the distance taken on the index , intersects the line to the meridian 202 for difference of latitude , and the line to the equator 135 for departure . Example - A ship sails S. 30 deg . W. 164 ...
Σελίδα 17
... Set the index on the course ; then the de- parture taken on the equator will give the distance on the index , and the line to the meridian for the diff . of latitude . Example . A ship sails north 2 points east till her departure is 116 ...
... Set the index on the course ; then the de- parture taken on the equator will give the distance on the index , and the line to the meridian for the diff . of latitude . Example . A ship sails north 2 points east till her departure is 116 ...
Σελίδα 18
... Set the index to meet the departure with the distance , it will be on the course , and will give the line to the meridian for the diff . of lat . Example . A ship sails southwesterly 104 miles , and her departure is 64 ; required the ...
... Set the index to meet the departure with the distance , it will be on the course , and will give the line to the meridian for the diff . of lat . Example . A ship sails southwesterly 104 miles , and her departure is 64 ; required the ...
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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