| Clue | Source | Date |
|---|---|---|
| Fins found on surfboards (5) | ||
| Surfboard stabilizers | LA Times Daily | 24 Jan 2018 |
| Surfboard stabilizers | The Washington Post | 24 Jan 2018 |
| Surfboard stabilizers | ||
| Back parts of keels | ||
| Rudder supports | ||
| Rudder supports | ||
| Rudder supports | ||
| They connect keels to sternposts | ||
| Keel extensions | ||
| Projections supporting rudders | ||
| Keel parts | ||
| Rudder support | ||
| Parts of keels. |