When at sea anyone can be attacked for simply being at sea.

If you are the captain of a ship that is sunk and you were not the aggressor (you did not fire the first shot), you can seek retribution for the sinking on land either by your own hands or by hiring a Mark.

You cannot hire for deaths at sea, only ship sinking. If you are a crew member and you die at sea, that is the risk you took going to sea.

You cannot resolve land conflicts via ship sinking. Someone sinking your ship repeatedly is not harassment, they do not need a reason, it is the risk of being at sea.

Point 16 has been added to HELP PK

Penned by My hand on the 2nd of Scarlatan, in the year 909 AF.