SEAWAY
| Date | Clue |
|---|---|
| 2016-03-19 | Main passage |
| 2013-11-07 | Ship's route |
| 2006-12-02 | Main lane |
| 2001-11-07 | Enlarged river, perhaps |
| 1998-12-04 | Lane in the main |
| Date | Clue |
|---|---|
| 2016-03-19 | Main passage |
| 2013-11-07 | Ship's route |
| 2006-12-02 | Main lane |
| 2001-11-07 | Enlarged river, perhaps |
| 1998-12-04 | Lane in the main |