Here’s some links for more information about celestial navigation from our presentation on April 30th, 2016.
History and general info:
Smithsonian Institute – Celestial Navigation at Sea
Space.com – Navigating by the stars
Secrets of Ancient Navigators – Nova
Pytheas’ Measurements of Latitude – Wikipedia
How to:
Rough Science Challenge – Measure Latitude and Longitude
Books:
American Practical Navigator (view online or download)
Longitude (preview below)