""Modern Up-To-Date Navigation: Position Finding By The Improved Sumner Method, Contrasted With The New Navigation And The Old Sumner Method"" is a book written by Harold S. Blackburne in 1914. The book provides a comprehensive guide to the improved Sumner method of position finding, which was a popular navigation technique used by sailors and seafarers during the early 20th century. The author contrasts this method with the new navigation techniques and the old Sumner method, providing a detailed analysis of their strengths and weaknesses. The book is a valuable resource for anyone interested in the history of navigation or the development of modern navigation techniques. It is written in clear and concise language, making it accessible to a wide audience. Overall, ""Modern Up-To-Date Navigation"" is a must-read for anyone interested in the fascinating world of navigation and the history of seafaring.Together With A Few Special Star Reduction And Azimuth Tables.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.