Porpoise was diving equipment developed by Ted Eldred who’s show at the third picture here below, he’s sitting on the left. His first project was an O2 rebreather. It had a safety device making it stop at the depth of 10 meters ( oxygen becomes poisonous when aspired under a to high pressure ) The project did not come further then a prototype and was abandoned after Ted Eldred had built compressed air scuba equipment with demand valves.

Ted Eldred’s Porpoise rebreather

Many thanks to Steven Taylor of the HDS SEAP for his great contribution to this chapter.


the scrapbook of diving history