A new and accurate method of finding a ship's position at sea, by projection on Mercator's chart ...
Subtitle: the principles of the method being fully explained and illustrated by problems, examples, and plates, with rules for practice, and examples from actual observation
By: by Capt. Thomas H. Sumner.
Publisher: T. Groom & co.
Published: 1843
Place of publication: Boston
Language: eng
Number of pages: 79
Subjects: Sumner's method
Notes: A digital reproduction made from a copy held by the University of Michigan is available from the University of Michigan's Making of America Web site.