| Clue | Source | Date |
|---|---|---|
| Quip, part 3 | New York Times | 28 Jun 2017 |
| French underwater explorer 1910-1997 | The Telegraph General Knowledge | 25 Jun 2017 |
| Quip, part 3 | ||
| Explorer born 6/11/1910 | ||
| To whom John Denver's "Calypso" is a tribute | ||
| Author of "The Silent World" | ||
| "Calypso" skipper | ||
| Aqualung inventor | ||
| Aqualung inventor | ||
| Explorer of "Silent World" |