A second safety system is a redundant mechanical or hydraulic device installed on a personnel lifting cage to prevent accidental detachment or uncontrolled descent. It acts independently from the primary suspension mechanism and is required in many safety standards to ensure that, if the main attachment fails, the cage remains securely connected to the lifting appliance. Second safety systems can include locking claws, safety pins, load-holding valves or overspeed protection devices. These components are designed and tested to withstand the full rated load of the cage under dynamic conditions. Their presence significantly reduces the risk of catastrophic accidents and is a critical feature when lifting personnel over container stacks, ship holds or industrial work areas.