The United States has long been aggressively enforcing compliance with the International Convention for the Prevention of Pollution from Ships, as amended (“MARPOL”), which is implemented in the United States by the Act to Prevent Pollution from Ships (“APPS”). Since the early 1990s, the effort has been directed at all types of registered and domestic tonnage – the full spectrum of waterborne commerce. Those entities and individuals prosecuted for MARPOL violations also span a wide spectrum of owners…