ROTTUM - ENI 02605477- 
| Name | : | ROTTUM |
| Former names | : | Sier (1985-1995) |
| ENI number | : | 02605477 |
| IMO number | : | 8408959 |
| Type | : | ferry between Lauwersoog and Schiermonnikoog |
| Built | : | 1985 |
| Length | : | 58,02 m |
| Beam | : | 13,8 m |
| Draught | : | 1,60 m |
| Speed | : | 10,8 knots |
| Capacity | : | 1000 passengers, 46 cars |
| Owner/manager | : | Rederij Wagenborg Passagiersdiensten BV - The Netherlands |
| Flag | : | The Netherlands |
| Port of registry | : | Schiermonnikoog |
