| Length (km) | River | % Correct |
|---|---|---|
| 1.048 | Rhine | 99%
|
| 2.811 | Danube | 95%
|
| 1.094 | Elbe | 90%
|
| 524 | Main | 79%
|
| 866 | Oder | 77%
|
| 545 | Moselle | 63%
|
| 382 | Spree | 61%
|
| 517 | Inn | 60%
|
| 452 | Weser | 57%
|
| 219 | Ruhr | 53%
|
| 367 | Neckar | 47%
|
| 371 | Ems | 45%
|
| 286 | Isar | 44%
|
| 325 | Havel | 40%
|
| 413 | Saale | 35%
|
| 218 | Fulda | 31%
|
| 220 | Lippe | 25%
|
| 292 | Werra | 25%
|
| 246 | Lahn | 23%
|
| 260 | Aller | 20%
|