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09-19-23, 01:20 PM
Replies: 159
Views: 6,406
Posted By HTupolev

A sundial is a totally different sort of device....

A sundial is a totally different sort of device. It doesn't track time, it measures local solar time, so even a hypothetical "perfect" sundial would be useless for things like marine chronometry.
09-17-23, 10:31 PM
Replies: 159
Views: 6,406
Posted By HTupolev

Is it still able to keep time well when all of...

Is it still able to keep time well when all of the cellular networks and GPS satellites are down?
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