Submarine2

A ship with this keyword printed on its deckplate card has removable hull pieces that are treated exactly the same as masts on a normal ship. At the beginning of your turn, decide if the submarine is submerged or on the surface. If submerged, lift the submarine's hull from its base so only the 'spine' is showing (the hull is set aside, and is still used to track damage to the submarine). When the submarine is on the surface replace the hull (minus any previously eliminated hull pieces). If submerged, a submarine can only move; it cannot shoot or be shot at, it cannot repair, it cannot dock, and it cannot be rammed. A submerged submarine may ram another ship, but regardless of success it must immediately be moved S away from the target instead of boarding. If a submarine is on the surface it functions exactly like a normal ship, except that it cannot pin or be pinned, cannot tow or be towed, and is not damaged when rammed (it can still board and be boarded normally).

Iron Hull7

Two hits from the same shoot action are required to eliminate one of this ship's masts.

Submerged Attack2

While on the surface, this sea monster can attack ships that are on the surface and submerged submarines with the same shoot action. It is never restricted to one or the other, provided that the targets are otherwise valid. While submerged, this ability allows this sea monster to be given a shoot action but it can target only submerged submarines. It cannot be used to attack submerged sea creatures or any ships on the surface, including submarines. This ability does not allow this sea monster to ram, pin, or board a submerged submarine.