The Sumner line of position furnished ready to lay down upon the chart by means of tables of simultaneous hour angle and azimuth of the navigator's stars. Between 27 ̊and 63 ̊of declination, latitude 60 ̊N. to 60 ̊S.
By: Published by the Hydrographic Office under the authority of the Secretary of the Navy.
Contributors: Littlehales, G. W. 1860-1943.
Series: H.O. pub -- no. 204
Publisher: Govt. Print. Off.
Published: 1925
Place of publication: Washington
Language: eng
Number of pages: 698
Subjects: Navigation -- Tables.
Genres: Tables.
Notes: Second edition, 1933, has title: The Sumner line of position furnished ready to lay down upon the chart by means of tables of simultaneous hour angle and azimuth of celestial bodies.

"The plan of arrangement and scope of these tables, as well as the method of using them in navigation, were conceived by Mr. G. W. Littlehales, C. E., hydrolic engineer, Hydrographic office, Washington, D. C."--Pref., p. iii.