Simware provides an open simulation platform to test naval combat systems. Navantia, a European combat management system integrator, used Simware to build a test site for its CATIZ system. The test site allows seamless interoperability between DDS, DIS and HLA simulations and the core of the CATIZ system. Simware provides a common platform to integrate different protocols and standards in the test site and manages real-time exchange of simulation data using DDS.