Refine by:
-
▾ Subject
- Navigational aids (7)
- Longitude (5)
- ASTRONOMY (4)
- Legislation (4)
- Nautical instruments (3)
- Astronomical Observatories (2)
- Geographical exploration (2)
- Marine navigation (2)
- Navigation (science) (2)
- Time Measuring Instruments (2)
- Latitude (1)
- Magnetism (1)
- Surveying (1)
-
▾ Date
- 1600s C.E. (1)
- 1700s C.E. (6)
- 1800s C.E. (7)