I'm sorry to jump in there, Mayor Mitchell.
Just quickly, as I've said, we've had a number of derelicts. We've had the misfortune of having to deal directly with the owners—if they can be found—and certainly a profile does develop. Without intentionally maligning anyone, the majority of derelict vessel owners have ended up in prison fairly quickly after their vessels arrived in the harbour, including one who was imprisoned overseas.
Generally, they are people who do not have the means to effect removal. A part of the pattern of disposal can seem to be to offload the costs associated with the vessel if the price of steel has fallen or they otherwise see themselves as not being able to afford to dispose of it. Abandoning it in the harbour has become a common means of disposal for people at that point.