Eternal2

When this ship sinks, do not remove it from the game. Instead, place it docked with no masts at your home island; its crew remain onboard but any treasure or other cargo (including equipment) that it carried is treated as if the ship sunk normally. You may repair the ship as normal at your home island. When a sea creature with this keyword is eliminated, do not remove it from the game. Instead, place it docked with no segments at your home island; it may then be given repair actions (like a normal ship) until it leaves your home island.

HI Raider +6

This ship can dock at an enemy home island and take as much treasure as she can carry. If able, she must leave on your next turn.