The Large Displacement Unmanned Underwater Vehicles Innovative Naval Prototype technology BAA will develop the critical technologies needed to enable UUVs to operate and survive in the littorals for 70+ days. The LDUUV is a pier- launched and recovered UUV (without the need for ship-launch or recovery) with the capability to transit in the open ocean and conduct over-the-horizon missions in littoral waters. This system will enable the extension of Navy platform sensing capability over the horizon and extend its influence. The creation of this UUV is intended to act as a significant force multiplier for the US Navy and will help close Warfighter gaps in a cost-effective manner. Two technology areas have been identified as critical to achieving this goal. These areas are Autonomy and Endurance Technologies.