What Unique Technique Did Filmmakers Use to Create a Realistic Underwater Scene in "The Abyss"?

In the making of the 1989 film "The Abyss," directed by James Cameron, filmmakers utilized a groundbreaking technique known as "water tanks" to create realistic underwater environments. Unlike traditional methods that often relied on special effects or computer-generated imagery, the team constructed massive water tanks where actors could perform in real water, allowing for authentic movement and interaction with their surroundings. This innovative approach not only provided a more immersive experience for viewers but also set a new standard for how underwater scenes were filmed in the industry. The film's remarkable visual effects, combined with the challenges of working in such an environment, earned it a special Academy Award for its achievements in visual effects, showcasing how technical creativity can elevate cinematic storytelling.