Tables for azimuths, great-circle sailing, and reduction to the meridian
Subtitle: with a new and improved "Sumner" method- latitudes 90⁰ N. to 90⁰ S., declinations 90⁰ N. to 90⁰ S.
By: by H.S. Blackburne
Edition: 3rd. ed.
Publisher: John Mackay
Published: 1911
Place of publication: Wellington, N.Z
Language: eng
Number of pages: 164
Subjects: Azimuth -- Tables.; Navigation -- Tables.; Great-circle sailing.; Sumner's method.
Genres: Tables.
Other titles: Tables for azimuths and great-circle sailing
Notes: "Also other useful navigational tables, with numerous examples of double altitudes, equal altitudes, azimuths, etc."

"Published by direction of the Hon. the Minister of Marine."