SHOAL
| Date | Clue |
|---|---|
| 2025-10-06 | Sandbar |
| 2025-08-10 | Certain water hazard |
| 2025-07-13 | Wet bar? |
| 2024-11-16 | Sandbar |
| 2022-05-14 | Large mass of swimming fish |
| 2021-09-04 | Sight at low tide |
| 2020-10-08 | Group of fish |
| 2019-10-06 | Boating hazard |
| 2019-10-05 | Submerged ridge |
| 2019-06-20 | Maritime hazard |
| 2018-06-03 | Riverboat hazard |
| 2018-04-29 | Bar that might be dangerous |
| 2017-09-13 | Boating hazard |
| 2017-05-10 | Maritime hazard |
| 2015-05-13 | Sandbar |
| 2014-04-23 | Sandbank |
| 2013-04-10 | Nautical hazard |
| 2012-05-30 | Nautical hazard |
| 2008-06-06 | Spit, e.g. |
| 2007-10-05 | Navigation hazard |
| 2006-03-20 | Sand bar |
| 2005-07-13 | Underwater sandbank |
| 2005-04-23 | Keel scraper |
| 2004-04-26 | River hazard |
| 2001-12-04 | School of fish |
| 2001-11-11 | Riverboat danger |
| 2001-08-17 | Sandbank site |
| 2000-01-17 | Sandbar |
| 1999-09-11 | Bar |
| 1999-05-16 | Place to run aground |
| 1999-04-05 | Sand bar |
| 1997-03-03 | Sand bar |
| 1997-01-13 | Sand bar |
| 1995-08-14 | Sandbank |
| 1995-03-05 | Sand bar |