Position finding by the improved "Sumner" method
Subtitle: contrasted with the new navigation (Marcq St. Hilaire System), and the old "Sumner" method ; together with a few special star reduction and azimuth tables
By: by H.S. Blackburne.
Publisher: John Mackay
Published: 1914
Place of publication: Wellington, N.Z
Language: eng
Number of pages: 80
Subjects: Navigation -- Tables.; Sumner method.
Genres: Tables.