Dan Blanchard

And so having all this competition up here that's not playing by the same rulebook, it's just, it's a challenge.

Dan Blanchard, who runs a Juneau-based cruise line called UnCruise with a U.S.-flagged fleet, says a lack of enforcement is chipping away at legal protections that date back more than a century.

Well, what we're seeing is a slow erosion.

And he says the problem goes far beyond the charter yacht fleet.