HLA, since its inception, has been a great success for interoperating simulators although its adoption in real time simulations has been more limited. The OMG DDS (Data Distribution Service) standard has been specifically designed to be applied in large critical distributed systems and federations of systems-of-systems. Some of the most prestigious organizations around the word have recommended or even mandated its use. NADS has adopted DDS for the foundations of SIMWARE: a disruptive high-performance Simulation middleware. In this paper it is presented one of the use cases where SIMWARE adds great value; in Naval Training & Simulation. Nowadays almost all of the most advanced Navies of the world are concerned about how to reduce costs of training their crews. Most of surface forces train both at sea and on shore, but seem to prefer at sea training in practice. A number of exercises could be conducted in port using LVC simulation, possibly at lower cost. But today, there are few training exercises with equivalencies in simulators. Even these equivalencies are only for a small part of all typical mission areas. An important stopper is the complexity of the simulation interoperability technology.