Watch Online Free on Watchseries. Using the latest marine survey techniques, HD photography, and underwater communications, National Geographic reveals one of the oldest intact shipwrecks in the world, which will transform understanding of 17th century trading. In the tradition of Jacques Cousteau, journey on an amazing expedition, conquering the unfamiliar, inaccessible waters of the Baltic Sea, to reveal one of the most technologically advanced trading ships of that time and cast a new light on history.