In 1987, the "Newtsuit" was developed by the Canadian engineer Phil Nuytten, and a version was put into production as the "Hardsuit" by Hardsuits International. The Newtsuit is constructed to function like a 'submarine you can wear', allowing the diver to work at normal atmospheric pressure even at depths of over . Made of wrought aluminium, it had fully articulated joints so the diver can move more easily underwater. The life support system provides 6–8 hours of air, with an emergency back-up supply of an additional 48 hours. The Hardsuit was used to salvage the bell from the wreck of the SS "Edmund Fitzgerald" in 1995. The latest version of the Hardsuit designed by Oceanworks, the "Quantum 2", uses higher power commercially available ROV thrusters for better reliability and more power as well as an atmospheric monitoring system to monitor the environmental conditions in the cabin.