Silent running is a stealth mode of operation for naval submarines. The aim is to evade discovery by passive sonar by eliminating superfluous noise: nonessential systems are shut down, the crew is urged to rest and refrain from making any unnecessary sound, and speed is greatly reduced to minimize propeller noise.
I wouldn't say they were hiding, just being as quiet as possible, but I'm not sure. It's also a film from 1972.
Silent Running is a 1972 environmental-themed American post-apocalyptic science fiction film. It is the directorial debut of Douglas Trumbull, and stars Bruce Dern, Cliff Potts, Ron Rifkin and Jesse Vint.