The last of the U.S. Navy's experimental undersea habitats, Sealab III accommodated five teams of 10 men each for 15-day stints 600 below the Pacific off San Diego. Ostensibly created for underwater scientific research, it was later revealed that the base was also used for Top Secret military experiments involving deep water EVAs.. There was one fatality during these experiments, and the program was eventually scrapped.

Aurora's flagship kit for 1970, the Sealab III featured a clear plastic shell through which one could see the habitat's complex interior. The kit enjoyed only a single issue.