Echo I
Topics referred to by the same term / From Wikipedia, the free encyclopedia
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"