In Nancy Drew: Sea of Darkness, Nancy needs to find all 5 gears, wheels, and crank to place in the wall found in the hidden room on the ship. Following Magnus’s notes and other clues, the gears are found in the following locations:
1. Carved Star – Solving the langpsil puzzle
2. Wooden Gear – Solving the Old Stulka mast puzzle
3. Wooden Wheel – Solving the lion head puzzle
4. Metal Crank – From Elisabet, after she rescues you
5. Metal Disc (Green) – When Gunnar leaves his spot
Place each of the five pieces into the door (see video for order of placement) until the gears turn and a door slides up.