Refine by:
-
▾ Subject
- ASTRONOMY (20)
- Longitude (17)
- Marine navigation (8)
- Time Measuring Instruments (6)
- Navigational aids (4)
- Nautical instruments (3)
- Tides (3)
- Geographical exploration (2)
- Latitude (2)
- Magnetism (2)
- Navigation (science) (2)
- Legislation (1)
- SCIENCE (1)
-
▾ Date
- 1700s C.E. (12)
- 1800s C.E. (17)