![A History of the Navy in 100 Objects show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/055/602/small/a-history-of-the-navy-in-100-objects.png)
Summary: Even though submarines entered mainstream use during World War I, they nevertheless were dangerous, and accidents were usually fatal. A series of mishaps on US submarines finally inspired one man to develop the tools that would help sailors escape from a sunken submarine. Charles Momsen was a pioneer in underwater rescue, and developed the rescue device that bears his name.