This was state-of-the-art in the 1980s, over 30 years ago… Pre video cameras in common use.
This was used at early DEMA Shows and other trade functions for 10 years, when Lorraine Evans was launching Fiji Diving to the world.
It’s a pity the tropical climate played havoc with it before being converted to digital 🙁
Source: Lorraine Evans, Scubahire/Beqa Divers, Fiji
Credit: Doug Cameron, Emerald Sea Productions, Canada