LINE OF POSITION NAVIGATION
by P. Ifland & M. Vanvaerenbergh
As it is with most discoveries, it is almost inconceivable that it took so long
to make them. How could seamen navigate for centuries, and not understand a
celestial line of position? Understanding "why they did what they did", is to
takes one's comfort with celestial navigation to a higher level.
Capt. Thomas
Sumner's line of position discovery, and later Marcq St. Hilaire's intercept
method are discussed and explained in the context of the conventional thinking
of the time. A complete reprint of Sumner's 1843 book, and a translation of
St. Hilaire's 1870 articles are included, and will make these landmark publications
more broadly available. Finally, a brief review of the modifications to their
methods bring the story up to date. We highly recommend this book for anyone
interested in more than just the rudiments of celestial navigation. SC, 2003,
200 pages. SW 1 lb.
