| Clue | Source | Date |
|---|---|---|
| Huge oil vessel | ||
| Big oil-carrying ship (11) | ||
| Large ship for oil transportation (11) | ||
| Large oil transporter | The Times Concise | 23 May 2016 |
| Large oil-carrying vessel | The Times Concise | 03 Nov 2015 |
| Large crude carrier | ||
| Exxon Valdez, for one | ||
| Exxon Valdez, for one | ||
| Large oil transporter |