How many individuals were rescued from the USS Squalus?

The USS Squalus, a U.S. Navy submarine that sank during a test dive in May 1939, marked a significant event in submarine rescue history. The rescue operation, which involved the innovative use of the McCann Rescue Chamber, successfully retrieved 33 of the 39 crew members who were trapped in the submarine. This operation highlighted advanced rescue techniques for submarines and conducted under challenging conditions. The context of the rescue and the number of individuals saved are vital in understanding the capabilities and importance of submarine rescue missions.