The American practical navigator : being an epitome of navigation and nautical astronomy (1888)
Bowditch, Nathaniel, 1773-1838, United States. Navy Dept. Bureau of Navigation, Cooper, Philip Henry, 1844-1912 · Washington : Govt. Print. Off. · leaf 116
if PM and PM be thecelestial meridians of two places; PS,the declination circle through the sun;PG, the Greenwich meridian; then Tg = the Greenwich time = GPS. Tm = the corresponding local timeac all places on the meridian PM = MPS. Tm = the corresponding local timeat all places on the meridian PM… … MPS— MPS Tra — Tm = Lo MPM } J > the difference of longitude of the two meridians. Both local and Greenwich times, or Tm and Tg, in the above formukie, are supposed to be reckoned westwardalways from their respective meridians and from o to 24I; in other words, Tg and Tm are the astronomical…
Navigation · Nautical astronomy
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