Shanghai based documentary, film and TV production – China production services
In June, 1931, one of Britain’s most lethal submarines collided with a merchant steamer and sank off the coast of China. Three hours later, six men bobbed to the surface. Their miraculous story changed marine safety forever. Their names, and their submarine, quickly sank into obscurity. Explorer and author Steven Schwankert spent five years working with the sailors’ descendants to try to answer the final question: if the HMS Poseidon still exists, where is it now?
