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.

Secret Hold6

Enemy ships can't take or transfer treasure from this ship.