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 7
... Correcting the dead reckoning Questions for practice Currents Table of the degrees corresponding to the points of the compass Determining the latitude by observation SECTION SECOND . Geometrical definitions Trigonometry 30 31 66 32 33 ...
... Correcting the dead reckoning Questions for practice Currents Table of the degrees corresponding to the points of the compass Determining the latitude by observation SECTION SECOND . Geometrical definitions Trigonometry 30 31 66 32 33 ...
Σελίδα 14
... corrected by nautical astronomy as the opportunities for ob- servations of the heavenly bodies afford . PLANE PLANE SAILING . 48. In plane sailing no regard is had to the spheri- cal figure of the earth ; which , for this purpose is con ...
... corrected by nautical astronomy as the opportunities for ob- servations of the heavenly bodies afford . PLANE PLANE SAILING . 48. In plane sailing no regard is had to the spheri- cal figure of the earth ; which , for this purpose is con ...
Σελίδα 32
... CORRECTING THE DEAD RECKONING . 107. If the courses and distances which a vessel is supposed to sail were uniformly true ... corrected by the dif- ference of latitude from observation , with the depart- ure from account - leaving the ...
... CORRECTING THE DEAD RECKONING . 107. If the courses and distances which a vessel is supposed to sail were uniformly true ... corrected by the dif- ference of latitude from observation , with the depart- ure from account - leaving the ...
Σελίδα 33
... corrected course N. 24 deg . 39 m . E. and the distance 242 miles . As the mid . lat . is not materially changed , the longitude remains the same . 113. Example . - A ship in lat . 44 deg . N. and lon . 60 deg . W. is supposed to sail N ...
... corrected course N. 24 deg . 39 m . E. and the distance 242 miles . As the mid . lat . is not materially changed , the longitude remains the same . 113. Example . - A ship in lat . 44 deg . N. and lon . 60 deg . W. is supposed to sail N ...
Σελίδα 37
... corrected for the longitude the ship is in . This correction is too apt to be neglected by some navigators , and the neglect in some cases may occasion an error of some miles in the latitude observed . 1 } SECTION SECOND . 134. THE ...
... corrected for the longitude the ship is in . This correction is too apt to be neglected by some navigators , and the neglect in some cases may occasion an error of some miles in the latitude observed . 1 } SECTION SECOND . 134. 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