| Title: | Position finding by the improved "Sumner" method : contrasted with the new navigation (Marcq St. Hilaire System), and the old "Sumner" method ; together with a few special star reduction and azimuth tables |
| Author: | Blackburne, Harold S. |
| Note: | John Mackay, 1914 |
| Link: | page images at HathiTrust |
| No stable link: | This is an uncurated book entry from our extended bookshelves, readable online now but without a stable link here. You should not bookmark this page, but you can request that we add this book to our curated collection, which has stable links. |
| Subject: | Navigation -- Tables |
| Subject: | Sumner method |
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