Sumner line of position, furnished ready to lay down upon chart <2>by means of tables of simultaneous hour angle and azimuth of navigator's stars; between 27 degrees and 63 degrees of declination, latitude 60 degrees N. to 60 degrees S.

Bibliographic Details
Corporate Author:	United States. Hydrographic Office
Format:	Government Document eBook
Language:	English
Published:	Washington : U.S. GPO, 1925.
Series:	Hydrographic Office Pub. No. 204
Subjects:	United States. > Hydrographic Office. Astronomy. Geography. Navigation. Electronic books.
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