DeepFlight announced it will introduce a new type of personal submarine at the 2014 Monaco Yacht Show. The company said its new product, the DeepFlight Dragon, is the most compact, lightweight personal submarine on the market, and is so intuitive to use that clients self-pilot the craft with minimal instruction. The all-electric (zero emissions) DeepFlight Dragon was designed specifically for easy use from yacht or shore to explore the twilight zone down to 400 feet (120 meters).