Lifelines must be used in accordance with the manufacturer’s instructions. In general, lifelines are connected to the system via a suitable carriage. The carriage in question is 100% connected to the system and allows movement. In order to connect the worker to the trolley, a full body safety harness with the standards specified in the user manual and an intermediate fastener suitable for the working environment (adjustable lanyard, rewind fall arrestor, double-arm lanyard, etc.) are required.