A device that measures the passage of a few minutes or an hour of time thanks to sand flowing through a narrow passage from one vessel to another.
1It will also ship with a sand timer.
2You can use the sand timer instead of the CD, but it's harder to keep an eye on that while you're racing around the temple.
3You've got sand timers which limit your actions, and one main timer which indicates how often the ship takes damage.
4The key mechanic of the game is in the sand timers which tell you when you can take an action.