Correct me if I am wrong, but isnt the US water boundary out to 200 miles?
Since the making of "Seal-bombs" illegal, I have had several over-confident seals/sealions come up to my boat waiting for me to hook, and or release fish. I found that taking a stiff plugging rod and 20# line, a 2oz sand sinker (like a .50 cent piece) and swung like a mother on top of the water works pretty well..... It makes a very LOUD *whack* sound that must be a bit painful on their sensitive ears... They leave and when I see them next they are a couple hundred yards away looking at me like they cannot understand what I just did..... Varmints......

MC