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Primers for such material would enable forensic squads to validate , for instance , whether a great white 's fin sitting in a Hong Kong market stall was harvested legally in Asia or illegally from protected U.S. waters . But , while necessary , NISA enactment is far from sufficient to protect U.S. waters from the impacts of harmful aquatic organisms and pathogens . The purpose of STEP is to facilitate the development of effective ballast water treatment technologies to protect U.S. waters against the unintentional introduction of nonindigenous species via ballast water discharges . True to its namesake , the USCGC Healy patrols and protects U.S. waters while carrying civilian scientists into the Arctic ice pack as far as the North Pole . The legislation , which Oberstar co-authored , would also clarify that the law is intended to protect U.S. waters from pollution , and it would remove the " navigable " - a word officials said has been a constant source of confusion . A U.S. - only system will never be enough to protect U.S. waters because a proliferation of source areas abroad would raise the odds that transfers to U.S. waters will take place passively or through the cracks on our own prevention system . " Primers for such material would enable forensic squads to validate , for instance , whether a great white 's fin sitting in a Hong Kong market stall was harvested legally in Asia or illegally from protected U.S. waters . Protect U.S. waters from foreign encroachment , enforce domestic fisheries laws , and honor international fishery agreements . The Senate is currently considering two bills that aim to protect U.S. waters from aquatic invaders .