A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 100
er, when the sunsaltitude is found to be 65°. The sub-solar point will then be at B, latitude POSITION AT SEA. 87 20°, longitude 30° W., and the radius of the circle of position BC will be25°, C being the ships place. Of course it would be impracticable to carry on a vessel a terrestrialglobe large… … —E Fig. 42. — Sumners Method. 126. The peculiar advantage of the method is, that a single obser-vation is used for all it is worth, giving accurately the position of a lineupon which the ship is somewhere situated, and approximately (by therough observation of the suns azimuth) the part of that…
Astronomy
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
