Gyroscopes played an important part in creating the gyrocompass, a compass that finds ''true'' north (the direction of Earth's rotational axis) and is not negatively influenced by ferrous metal in the ship's hull.
Gyroscopes played an important part in creating the gyrocompass, a compass that finds ''true'' north (the direction of Earth's rotational axis) and is not negatively influenced by ferrous metal in the ship's hull.
−
They are also used for [[inertial navigation system]]s,<ref>Honeywell Commercial Aviation Products: [http://www.honeywell.com/sites/servlet/com.merx.npoint.servlets.DocumentServlet?docid=D1A8786B5-5658-438B-AB93-7B37E787F29A GPS Align in Motion of Civilian Strapdown INS]</ref> which in turn are used in [[ballistic missiles]].
+
They are also used for [[inertial navigation system]]s,<ref>Honeywell Commercial Aviation Products: [http://www.honeywell.com/sites/servlet/com.merx.npoint.servlets.DocumentServlet?docid=D1A8786B5-5658-438B-AB93-7B37E787F29A GPS Align in Motion of Civilian Strapdown INS]</ref> which in turn are used in [[ballistic missile | ballistic missiles]].