A submersible generator was designed as a distinct and critical subassembly of marine hydrokinetics systems, specifically tidal and stream energy conversion. The generator is designed to work with both vertical and horizontal axis turbines. The final product is a high-pole-count, radial-flux, permanent magnet, rim mounted generator, initially rated at twenty kilowatts in a two-meter-per-second flow, and designed to leverage established and simple manufacturing processes. The generator was designed to work with a 3 meter by 7 meter Gorlov Helical Turbine or a marine hydrokinetic version of the FloDesign wind turbine. The team consisted of experienced motor/generator design engineers with cooperation from major US component suppliers (magnetics, coil winding and electrical steel laminations). Support for this effort was provided by Lucid Energy Technologies and FloDesign, Inc. The following tasks were completed: A¢Â€Â¢ Identified the conditions and requirements for MHK generators. A¢Â€Â¢ Defined a methodology for sizing and rating MHK systems. A¢Â€Â¢ Selected an MHK generator topology and form factor. A¢Â€Â¢ Completed electromechanical design of submersible generator capable of coupling to multiple turbine styles. A¢Â€Â¢ Investigated MHK generator manufacturing requirements. A¢Â€Â¢ Reviewed cost implications and financial viability. A¢Â€Â¢ Completed final reporting and deliverables