On this weeks PR Podcast we talk about the Yuan Class submarine, but also the implication of Sub's within our own time as well. Correction it was a map done in 1947 link to the article https://qz.com/705223/where-exactly-did-chinas-nine-dash-line-in-the-south-china-sea-come-from/.

The H L Hunley was the name of the Submarine https://www.history.com/news/confederate-submarine-hunley-sinking-mystery-civil-war 

References:

Sutton, H I. & Davis, C Edward "World Submarines Covert Shores Recognition Guide" (13 July, 2020).

 Majumdar, Dave "A New Type of Chinese Submarine Is Supposedly Breaking Records. Here's What We Know." National Interest. (August 27, 2018).