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 9
... called Nautical Astron- omy comprehends observations of the heavenly bodies , by suitable instruments , whereby the ship's place may be known with more certainty . Description of the Diagram of Navigation 3. The Diagram of Navigation is ...
... called Nautical Astron- omy comprehends observations of the heavenly bodies , by suitable instruments , whereby the ship's place may be known with more certainty . Description of the Diagram of Navigation 3. The Diagram of Navigation is ...
Σελίδα 14
... 8 points or 90 degrees . 52. The DISTANCE is the extent the ship sails on a direct course ; it is reckoned in miles , and is determin- ed by an instrument called the LOG . 53. The DIFFERENCE OF LATITUDE is the north , or 14.
... 8 points or 90 degrees . 52. The DISTANCE is the extent the ship sails on a direct course ; it is reckoned in miles , and is determin- ed by an instrument called the LOG . 53. The DIFFERENCE OF LATITUDE is the north , or 14.
Σελίδα 18
... called traverse sailing . These courses and the distances are entered in the traverse table so called ; and on each separate course and distance is calculated , by case 1 , plane sail- ing , the difference of latitude and the departure ...
... called traverse sailing . These courses and the distances are entered in the traverse table so called ; and on each separate course and distance is calculated , by case 1 , plane sail- ing , the difference of latitude and the departure ...
Σελίδα 26
... called meridional parts ; and the meridion- al difference of latitude is in the same ratio to the dif- ference of longitude , that the proper difference of lati- tude is to the departure . 95. To find the meridional parts by the diagram ...
... called meridional parts ; and the meridion- al difference of latitude is in the same ratio to the dif- ference of longitude , that the proper difference of lati- tude is to the departure . 95. To find the meridional parts by the diagram ...
Σελίδα 37
... called north - if it bear north , it is called south . 132. If the sun's declination be of the same name as the zenith distance , add them together , and their sum is the latitude of the place of observation ; but if they be of ...
... called north - if it bear north , it is called south . 132. If the sun's declination be of the same name as the zenith distance , add them together , and their sum is the latitude of the place of observation ; but if they be of ...
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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