Hyper-Sub Platform Technologies Inc. (HSP) is the design house that created, developed and builds the Fast Boat Submarine (FBS), the world’s ﬁrst dual modality, dual use marine vessel operating equally eﬃciently as both a long- range speedboat and pressure proof, dry cabin submarine. The ingenious design is highly scalable and modular, employing multiple diﬀerent cabin conﬁgurations and payload packages for a wide variety of Littoral Concepts including crewed or uncrewed operations. It can also be upgraded with after-market capabilities and weapons systems as emerging technology and requirements develop, including full autonomy and swarm or other AI algorithms. As a speedboat, FBS can be launched from any host vessel, small dock, beach or river estuary, can travel hundreds of miles on the surface and arrive quickly at a dive site; then unlike any other vessel before, it can submerge in under sixty seconds for extended periods and long distances as an electric submarine, to a depth of 500ft (150m), by engaging a few control switches. All while keeping crew/payload dry, warm and safe from the eﬀects of pressure.