- Sent in 1974 to hopefully make contact with extraterrestrial life Radio signal contains basic info about earth & humanity
- A one time radio wave transmission to mark the remodeling of the Arecibo telescope in Puerto Rico on Nov 16 1974
- Sent to globular star cluster M13 in the hope that extraterrestrial intelligence might receive and decipher it.
- The “ones” and “zeros” were transmitted at a frequency shifting the rate of 10 bits per second. The total broadcast was 3min