Archibald Guillan's book on mathematical theory and its application to practical navigation
- Guillan, Archibald
Ranges from first principles of mathematics to complex navigational calculations. Includes exercises in mathematics and sailing, details of writing a ship's log, journals of voyages from England to Madeira in May and Sept-Oct, and three ink and colour wash maps of Europe, Africa and the world.
Presumably the text/exercise book is of a studious junior officer.