I would nuke em but then for those a little more restrained there is always MOABs, and a plethora more of what is still in our arsenal.
This makes me think of high speed cigarette boats, except they have missile launchers and .50cal.
These are usually small boats operating from a “mother” ship.
An Ohio class sub with a half dozen souped up PWCs that can be launched from a piggyback underwater “hanger” would be a plan, the boomers are a hole in the water and there is “equipment” on them recently that allows marines or SEALs to egress like with an underwater delivery device. A military grade PWC with an offensive weapon would be one way to go about this, or have a lighter than air platform on station and use remote operated aircraft. It would have better radar coverage weather permitting.
There are no MOABs in our arsenal. We decided not to go into production with them. There is no napalm either.
They are in a *lifeboat*. Just back off, get up some speed, do a close pass and swamp the bastids. Pick the Captain out of the water, leave the pirates for the sharks. Sharks gotta eat too you know.
As for those on shore, A few (dozen) little 500 lb bombs dropped by a single pass of a BUFF would have interesting effects on the pirate "infrastructure".