The Journal of the Royal Astronomical Society of Canada 1922-11: Vol 16 Iss 8 (1922)
Royal Astronomical Society of Canada · leaf 18
“Sumner Lines’’ in Navigation 295 53° 30’ 59” and 53° 32’ 39’’, and in the second 53° 32’ 07” and 53° 32’ 20’. The “‘fix’’ is somewhere around X—or about latitude 39° 48’ 40” and longitude 53° 32’ 16’. To calculate this point exactly: In the triangle ABX the angle A (or CAE) may be found by A CE… … De | 4S I at* But CE is the difference between the assumed latitudes, and AE is the difference between the first longitude at the first latitude and the first longitude at the second latitude. Again the angle B may be found by tan (180°—B) = —tan B=
Astronomy · Scholarly Journals · Microfilm
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