The old-school way to navigate is with a clock and a sextant, but you can also hack together this alternative.
https://media.wired.com/photos/5c12fac318da281541da65d1/master/pass/radio-90737008.jpg
The old-school way to navigate is with a clock and a sextant, but you can also hack together this alternative.
https://media.wired.com/photos/5c12fac318da281541da65d1/master/pass/radio-90737008.jpg