WW, that's a photo of Project Baker, the second Operation Crossroads Bikini Atoll test and which involved an underwater detonation.
Surprisingly the Prinz Eugen, which being used as a weapons effect test item, survived the explosion despite being only 2000 yards from the wepaon. This was the second test wich the Prinz Eugen had survived, the first being Project Able, a low-level atmospheric test at Bikini Atoll, the ship being only 1200 yards from ground zero..... She later sank under tow on the way to Kwajalein a year later.
So would blowing pirate boats away with bombs even work?
And for all those who were once 'involved in certain activities' and might have wondered what SUPA stood for, it was 'SUpport for Project Able'!