I think the term “PDA” dates back to about then.
Personal …Dubious(…?) Assistant?
Position determinating assistant
Still couldn’t calculate longitude at sea
What are the blank pages for? Are you supposed to engrave your notes on them?
My guess would be to add area specific star patterns to make local traveling easier.
Like having a detail specific map for each specific point of interest.
I was wondering that myself!
You can’t use it as a phone, so yes
I thought I had volvelles in high school, but it just turned out to be a cold.
even if it folds up a bit it still looks really bulky.
Dude, it’s technology from 500+ years ago. Give 'em a break
How big is this thing? I have no sense of scale here.
For others that also didn’t know what this means: https://norselandsrock.com/stonehenge-spinal-tap/
“Perhaps we could re-choreograph the dance so it wouldn’t be in danger of being knocked over?”
I wonder how the lunar volvelles worked
Sounds like it’s based on the moon obviously, so what happens if it’s below the horizon or in the new moon phase?
OpenSource, no ads, nor tracking or logging, anonymous. no account needed, but not a Phone
Looks like a flip book made of gold. Flip those pages fast enough and it animates the stars moving across the sky!
50kg flip book
I’d a page comes loose it could chip your spectacles.
I suspect it’s brass or just gold plated. Gold on it’s own would not be particularly durable. Unless this was meant to be like those spinny clocks grandpa had on his window sill- purely decorative.
I suspect it’s a steampunk necronomicon.