CATHARINA 11 - IMO 8433435- 
| Name | : | CATHARINA 11 |
| Former names | : | Zephyrus (2009-2014), IJsselstroom (1992-2009) |
| IMO number | : | 8433435 |
| ENI number | : | 02718227 |
| Type | : | tug |
| Built | : | 1992 |
| Length | : | 19,5 m |
| Beam | : | 6 m |
| Draught | : | 2,54 m |
| Bollard Pull | : | 15 t |
| Speed | : | 11,6 knots |
| Owner | : | Hebo Maritiemservice, Zwartsluis - The Netherlands |
| Flag | : | The Netherlands |
| Port of registry | : | Rotterdam |
