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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11 페이지
... added or subtracted , accord- ing to the next logarithm being more or less . Up to and including 4 ° and other angles on the same pages , the correction columns contain the difference for I ' . When the angle falls on those pages , the ...
... added or subtracted , accord- ing to the next logarithm being more or less . Up to and including 4 ° and other angles on the same pages , the correction columns contain the difference for I ' . When the angle falls on those pages , the ...
43 페이지
... logarithm of the difference of longitude 190'.6 add the logarithm cosine of the middle latitude 38 ° 18 ′ 26 ′′ , which gives the logarithm of the departure 149′.6 and from that subtract the logarithm of the difference of latitude 174 ...
... logarithm of the difference of longitude 190'.6 add the logarithm cosine of the middle latitude 38 ° 18 ′ 26 ′′ , which gives the logarithm of the departure 149′.6 and from that subtract the logarithm of the difference of latitude 174 ...
44 페이지
... Add together the latitude of the point left and that of the ship . Then divide by 2 , which will give the middle latitude . From the logarithm of the departure 216'.5 subtract the logarithm cosine of the middle latitude 36 ° 56 ′ 25 ...
... Add together the latitude of the point left and that of the ship . Then divide by 2 , which will give the middle latitude . From the logarithm of the departure 216'.5 subtract the logarithm cosine of the middle latitude 36 ° 56 ′ 25 ...
45 페이지
... logarithm of the distance 362'.0 add the logarithm cosine of the course S. 65 ° E. , which gives the logarithm of the difference of latitude 153'.0 and is subtracted from the latitude left because the ship has sailed south . To the ...
... logarithm of the distance 362'.0 add the logarithm cosine of the course S. 65 ° E. , which gives the logarithm of the difference of latitude 153'.0 and is subtracted from the latitude left because the ship has sailed south . To the ...
46 페이지
And Examination Specialty Richard Marriotte Pugsley. Add together the latitude of the point left and that of the ship . Then divide by 2 , which will give the middle latitude . To the logarithm of the departure 328′.1 add the secant of ...
And Examination Specialty Richard Marriotte Pugsley. Add together the latitude of the point left and that of the ship . Then divide by 2 , which will give the middle latitude . To the logarithm of the departure 328′.1 add the secant of ...
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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