11:53

Pelorus, Course Corrector, and Marine Computer: Navigation Essentials

32:01

Sextants and the History of Celestial Navigation

16:40

Wire Recorders: the OG Magnetic Recording Technology

17:06

WWII Drift Sights: a Grounded Approach to Navigation

17:41

The Lost Art of Creating a Fanzine with a Spirit Duplicator

15:08

Magic Brain: Last Gasp of the Mechanical Calculator

9:35

Sundial Ring and Nocturnal: Does Anyone Have the Time?

12:23

Carbide Lamps: the Caver's Friend