Pugsley's Dead Reckoning, Including the Various Methods of Finding Course and Distance by Mercator and Middle Latitude Sailings: And Examination SpecialtyR.M. Pugsley, 1916 - 176페이지 |
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add the logarithm Barnegat light Cape Horn chief mate coastwise steam vessels compass course corresponding number course and distance COURSE NUMBER DEAD RECKONING deck department difference of latitude difference of longitude Dist distance column Enter Table EXAMPLE NUMBER EXPLANATION Find Find the course Find the difference gives the logarithm latitude 35 latitude 55 latitude and departure latitude and longitude latitude and takes latitude by subtracting latitude column logarithm cosine logarithm secant logarithm tangent Long longitude 74 mate of ocean Mercator sailing meridional difference Middle lat middle latitude sailing mile and find miles and name name it south navigation nearest mile ocean or coastwise ocean steam vessels original license pilot point in latitude point left Prop proper difference PUGSLEY'S sail vessels Sandy Hook ship 38 ship has sailed signals subtract the logarithm subtracting the latitude Table 3 take take the meridional tang third mate traverse table white light