Sealab (2019)

The Sealab project, launched in 1969 off the shore of northern California, was the brainchild of a country doctor turned naval pioneer who dreamed of pushing the limits of ocean exploration like NASA did space exploration. The massive, 300-ton tubular structure was a pressurized underwater habitat, complete with science labs and living quarters for divers who would live and work there on the ocean floor for days or even months at a time. During the height of the Space Race, this daring program also tested the limits of human endurance and revolutionized the way humans explore the ocean.

Unfortunately the movie Sealab is not yet available on HBO Max.