Charmerr
Sea Legs
There's a hacker that can sink people's ships. Happened to me about a month ago. I've heard others talking about it today as well so the person must be back.
Earlier today I was sunk twice by a player that had someone managed to obtain the ability to sink other players' ships. I didn't notice it the first time because I sank instantly, but the 2nd time a lot of the broadside hit my sails and I was left in the red for health and no sails left. The player ship was invisible in both instances for me, I wonder if maybe that is what happened to you?
If the ship was invisible sounds like it could be a little over speculated. I think it's just a bug, but at the same time I have seen NPC's battling ships that I couldn't see and sinking.... Weird, hopefully they catch on with it.