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 13
... east or west 180 ° . 38. The First Meridian is the meridian of some chosen place , from which the longitude is reckoned . 39. Different nations have chosen different meridians for their first meridian . The English and the Ameri cans ...
... east or west 180 ° . 38. The First Meridian is the meridian of some chosen place , from which the longitude is reckoned . 39. Different nations have chosen different meridians for their first meridian . The English and the Ameri cans ...
Σελίδα 14
... east 3 points or 90 ° , from the north to the west 8 points or 90 ° , from the south to the east 8 points . or 90 ° , and from the south to the west 8 points or 90 degrees . 52. The DISTANCE is the extent the ship sails on a direct ...
... east 3 points or 90 ° , from the north to the west 8 points or 90 ° , from the south to the east 8 points . or 90 ° , and from the south to the west 8 points or 90 degrees . 52. The DISTANCE is the extent the ship sails on a direct ...
Σελίδα 15
... east or west distance , made on a direct course , and is reckoned in miles . 55. By these definitions it is evident that if a ship sail due north , or south , the difference of latitude will be equal to the distance sailed , and there ...
... east or west distance , made on a direct course , and is reckoned in miles . 55. By these definitions it is evident that if a ship sail due north , or south , the difference of latitude will be equal to the distance sailed , and there ...
Σελίδα 16
... east , 243 miles , required the difference of latitude and de- parture . Here the 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 ...
... east , 243 miles , required the difference of latitude and de- parture . Here the 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 ...
Σελίδα 17
... east till her departure is 116 miles ; required the distance and diff . of latitude . Here the index set on the course 2 points , the de- parture 116 taken on the equator will give the dis- tance 246 on the index , and the line 217 to ...
... east till her departure is 116 miles ; required the distance and diff . of latitude . Here the index set on the course 2 points , the de- parture 116 taken on the equator will give the dis- tance 246 on the index , and the line 217 to ...
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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