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 37
... moon or stars . 128. The most convenient and common method of determining the latitude at sea is by taking , with a quadrant , the meridian altitude of the sun . 129. The apparent altitude of the sun , and also that of the moon ...
... moon or stars . 128. The most convenient and common method of determining the latitude at sea is by taking , with a quadrant , the meridian altitude of the sun . 129. The apparent altitude of the sun , and also that of the moon ...
Σελίδα 62
... moon . " 242. " The parts of the earth directly under the moon , or where the moon is in the zenith ; and those places which are directly opposite to the former , or under the nadir , will have high water at the same time . " " 243 ...
... moon . " 242. " The parts of the earth directly under the moon , or where the moon is in the zenith ; and those places which are directly opposite to the former , or under the nadir , will have high water at the same time . " " 243 ...
Σελίδα 63
... moon , and these are called spring tides . " 246. " The tides are less than ordinary twice every month ; that is about the time of the first and last ters of the moon , and these are called neap tides . " quar 247. " The spring tides do ...
... moon , and these are called spring tides . " 246. " The tides are less than ordinary twice every month ; that is about the time of the first and last ters of the moon , and these are called neap tides . " quar 247. " The spring tides do ...
Σελίδα
... moon , do not rise so high as in the temper- ate zones northward and southward , where the ocean is considerably wider . " 254. " The tides in the Atlantic , in the torrid zone , flow from east to west till they are stopped by the ...
... moon , do not rise so high as in the temper- ate zones northward and southward , where the ocean is considerably wider . " 254. " The tides in the Atlantic , in the torrid zone , flow from east to west till they are stopped by 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