This dataset was developed under TEAMER technical support (CRD-21-17763-0) to model the Aquantis AQ10, a spar buoy-based marine hydrokinetic turbine, using the OpenFAST simulation framework. The project transitioned modeling from the proprietary Tidal Bladed tool to OpenFAST to enable more flexible control strategy development and expanded physics-based capabilities. The dataset includes input files and simulation cases representing key dynamic behaviors such as added mass, wave loading, rotor-to-spar coupling, tower shadow effects, and a custom mooring system. The model supports integration with MATLAB/Simulink for controller implementation. Also included is a post-access report detailing the modeling approach, validation results, and simulation findings from this work. his work was funded by TEAMER RFTS 2 (request for technical support) program.