It was a plutonium fission detonation via implosion. Yield was around 20 kilotons (20,000 tons).
Castle Bravo was 15 megatons (15,000,000 tons)
Had the USS Arkansas been in the same location for a 15 megaton shot it would have ended up, mostly, in the stratosphere. As highly radioactive particles.
The USS (formerly KM) Prinz Eugen was in two of the tests at Bikini.
It survived both tests and is laying upside down at Kwajalein.
It’s clean enough for diving now.
My late Brother in Law was in the Navy at the Bikini test explosions. He died young ... while in his fifties.
So it still would have been pointed straight up! (more or less)