For centuries, sailing ships used deck prisms to provide a safe source of natural sunlight to illuminate areas below decks. Before electricity, light below a vessel's deck was provided by candles, oil and kerosene lamps—all dangerous aboard a wooden ship. The deck prism laid flush into the deck, the glass prism refracted and dispersed natural light into the space below from a small deck opening without weakening the planks or becoming a fire hazard.
this post was submitted on 28 Dec 2024
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Neat 📸
Very cool. Never heard of this before.
Thats cool as hell, thanks for sharing, I really liked this one
I wish the article had a picture of one in use