As the business for autonomous vessels develops, AI trustworthiness prediction has become more crucial than ever before to reduce maritime accidents and improve safety in live maritime environments.  Fully autonomous operations sit very poorly with harbor masters on the grounds of public safety.  Achieving system trustworthiness prior to live testing may be achievable in a synthetic environment.  Although not fully proven, the establishment of a simulation-based test capability will radically alter the path of systems as they are introduced to the real world.  A pilot effort recently demonstrated will be presented as an example for developing a Live-Virtual-Constructive (LVC) environment for testing maritime autonomies in a distributed, international framework.