The RGA4 is a three way retrieval block, fitted with an up / down rescue winch mechanism and the standard fall arrest capability. In the event of a fall, the operative can be winched up or down to safety. The RGA4H can raise the operative to a safe area if the area below is unsuitable. The man-riding winch function is for use only as a rescue provision – NOT for access / egress. This must be backed up with a separate fall arrest system, and a rescue provision that is also separate to the winch.