James Cameron spent ‘10-11 hours a day’ underwater to make The Abyss, which sounds terrible

polygon.com:

Behind-the-scenes stories from the set of James Cameron’s The Abyss are nearly as coveted by longtime fans of the aquatic odyssey as the movie itself. A majority of the 1989 film was shot in enormous water tanks, and the labor of both performing and diving each day led the cast to experience multiple emotional breakdowns. Much of the endurance test is well-documented, but Cameron clearly has a few things left to say.

Fox and Cameron’s long-awaited 4K transfer of The Abyss on Blu-ray finally arrives on Tuesday, and with it, a handful of new extras, including a brand new making-of documentary, “Deep Dive: A Conversation with James Cameron.” In this exclusive clip from the doc, Cameron digs into how much consideration went into the underwater production… even if the result was still a pain-in-the-ass for all involved.

After an extensive search around the globe for a location where a science-fiction movie set around the wreckage of a downed submarine could actually be shot, Cameron and his team decided… there was no place that already existed on Earth in which they could get the job done. The man has high standards! So they settled on building a 7.5 million gallon tank for the movie at an abandoned power plant in southern California. But finding a place to let Ed Harris and Mary Elizabeth Mastrantonio swim around and make extraterrestrial contact was only the beginning of the reimagining of the studio filmmaking process. As Cameron details in the clip from “Deep Dive: A Conversation with James Cameron,” his entire crew had to be trained and outfitted for all the types of conversations and decision-making that takes place on a common land-based film set.

“We needed to be able to talk to each other underwater,” Cameron says