The whys and wherefores of navigation

by Gershom Bradford

"The Whys and Wherefores of Navigation" by Gershom Bradford is a scientific publication written in the early 20th century. The book serves as an instructional guide focusing on the principles, practices, and theories of navigation, specifically aimed at those already familiar with the basics but seeking to deepen their understanding of maritime navigation. The opening of the book introduces the subject of navigation, emphasizing the importance of mastering the various methods and systems relating to direction, compass usage, and dead reckoning. Bradford outlines how effective navigation requires a thorough understanding of multiple systems, such as degrees and points of direction, and emphasizes calculations like dead reckoning that a mariner must make amid many diversions caused by natural elements. Additionally, he underscores the significance of formal training and reference materials for aspiring navigators while establishing the context of the book as a supplementary reading to existing nautical literature for those wanting to grasp the 'whys and wherefores' behind the methods they typically employ at sea.