SEALAB III was part of a U.S. Navy experiment in saturation diving aimed at exploring deeper ocean habitats. It aimed to reach depths of 610 feet, but tragedy struck when aquanaut Barry Cannon died during a dive, initially attributed to CO2 poisoning from a faulty rebreather. However, later insights suggest the cause of death was likely electrocution due to serious electrical design flaws within the habitat. The project suffered from numerous technical issues and poor communication, ultimately ending the SEALAB III program. Responsible parties have since been called to account for their design and safety oversights.