Jolly rogers ship question

[piratesahoy]

I believe those are the skeleton ships. I boarded one the other day accidentally and steered around for a while. Unfortunately, when I docked, instead of getting the cargo, I had to repair the ship and got nothing.

[Schmoofy]

I saw some of them yesterday was well. I ended up bringing them down thinking they're worth a lot of rep: I was wrong. A level 14 Light Frigate gave me 100+ rep for sinking it, while this level 25 Death Omen only gave me 80.

[Sassybree]

I saw the same thing, mine was only a 14 (Raven something) ghost ship and shot it down alone and got like 39 cannon points and only 1 cargo. Went back and it was the same ship only level 13 and I shot out the sails first and got 100 cannon rep points and a full load on my light frigate.