why is LDWF out at Medusa?

[jopete]

last week I was fixing to fly in from a rig next to the Medusa production facility way the heck out there in Mississippi Caynon. I see a boat come flying up to the rig and it's a 30-40' LDWF boat with four 300 mercs on the back.
they circle the rig a few times then drive off.

what do u think they were looking for? maybe somebody fishing off the rig?
can they even do anything to anybody out there in international waters?
just seemed strange to me to see ldwf instead of coast guard or homeland security way the heck out there past state waters.