The story of how a U.S. Navy program sought to develop the marine equivalent of the space station-- and forever changed man's relationship to the sea. We learn of men unafraid to test the limits of physical endurance to conquer a hostile undersea frontier-- and of a government unwilling to take the same risks underwater that it did in space.

In 1969 off the California coast, a US Navy crane carefully lowered a massive tubular structure into the waters. It was designed for an elite group of divers to spend days or even months at a stretch living and working on the ocean floor. The video tells the little-known story of the daring program that tested the limits of human endurance and revolutionized undersea exploration.

"Invited to the world's only undersea research station, the Skylar family heads to the Florida Keys and dives into an unexpected adventure. While visiting their ex-military friends in the Aquarius Sea Station, Ezzy and Luke encounter a strange algae bloom at the surface, giant goliath groupers, and a mysterious fish that threatens the coral reefs and their own safety. Once again, they unwittingly stumble into a plot that could have disastrous consequences...

Describes what it is like to search for shipwrecks on board a research ship and to live and study in an underwater science laboratory.

Describes various machines, devices, and equipment used in the sea and discusses their uses. Includes submarines, sea laboratories and habitats, and diving suits.