HRU is a device to be used in all the maritime sector, oil platforms, cruise ships, military ships, yachts, leisure crafts, as well as evacuation systems in the aviation sector. It has been developed for the emergency conditions where the life rafts can't be manually released, as the vessel starts to submerge. Before the vessel submerge in a depth not more than 4 meters, HRU activates the cutter of the rope from the linkage of life rafts Safetmade HRU has new seperate weak link design, which has very stable breaking strain and easier to install.