Echo I or Echo 1 or variant, may refer to: Echo I-class submarine of the Soviet Navy Echo 1, a 1960 NASA Project Echo passive communications satellite that failed to make it to space Echo 1A, a 1960 NASA Project Echo passive communications satellite that was NASA's first comm satellite, thus also referred to as "Echo 1" See also EchoStar I, a 1990s communications satellite Echo (disambiguation)