I'm with Hippocampus. We have a huge problem with abandoned boats, most of which went through the process of being a live aboard, then a run down live aboard, then a derelcit, and finally abandoned. Often the owners are from out of state or cannot be traced, thus the wreck ends up a liability. Even if onwers can be traced, unless they are local a supoena cannot be enforced to make them do anything unless the vessel obstructs navigagtion. Most do not. One township got a $150,000 grant to dispose of abandoned boats. Went as far as removing 10. 10! most were 25-30 foot vessels. $15K a pop to have them hauled onto a barge and taken to a place where they could be chain-sawed, then hauled to the landfill.
When grants don't come to remove abandoned boats, guess where it comes from? Taxes.