Lambertsen Amphibious Respirator

The Lambertsen Amphibious Respirator, developed by Dr. Christian Lambertsen in the early 1940s, is an early type of rebreather used by military divers. It allows divers to breathe underwater without releasing bubbles, making it ideal for reconnaissance and clandestine operations. The device recycles the diver’s exhaled air by filtering out carbon dioxide and replenishing oxygen, enabling extended underwater activity. Its design contributed significantly to modern closed-circuit rebreathers used in military, professional, and recreational diving.