| Clue | Source | Date |
|---|---|---|
| Reached out electronically | Newsday | 19 Nov 2022 |
| Sounded like sonar | Newsday | 20 Aug 2021 |
| Sounded like sonar | Newsday | 11 Oct 2020 |
| Made a nickel-hitting-metal sound | Universal | 23 Nov 2018 |
| Made a nickel-hitting-metal sound | ||
| Sounded, as sonar | USA Today | 06 Jun 2017 |
| Sent a reminder to | Wall Street Journal | 03 Feb 2017 |
| Sounded, as sonar | ||
| Bounced off a cell tower | Wall Street Journal | 02 Apr 2016 |
| Made a metallic sound | Newsday | 11 Jan 2015 |
| Made a metallic sound | ||
| Made a metallic sound | ||
| Made a metallic sound | ||
| Made a metallic sound | ||
| Made a metallic sound | ||
| Sounded like sonar | ||
| Sounded noisy, as engines go | ||
| Clinked | ||
| Made a ringing sound. |