I spawned in and saw a ghost ship coming close to the outpost I was on. Btw I'm playing solo. I was like what the heck, might as well shoot at it. I eventually sunk it after using all my cannonballs. And there wasn't any loot. Is this normal? I think you should get SOMETHING for defeating such a hard challenge, especially on solo.
Edit* Just checked Bilge Rats, still showing 0/50 skeleton ships destroyed...