Cabin Key (Wreck of the Maria Doria)
From WikiRaider
The Cabin Key is a key found in the level Wreck of the Maria Doria in Tomb Raider II
This is located upon the sea floor. To get to it, Lara must first unlock a trapdoor that accesses that area, and then she must swim to get it, while avoiding Barracudas and Sharks.
It unlocks the door to the cabin, where a switch is.
