The High Level Architecture (HLA) is an architecture for constructing distributed simulations, including virtual, constructive, and live applications. The HLA is intended to facilitate interoperability among all types of simulation models and promote the reuse of simulation components. One of the possible approaches to transition legacy systems to the HLA is a standalone internetworking device to provide interoperability between DIS and HLA applications.

IST has previously reported the use of one such device, a prototype version of the IST HLA Gateway, to connect a SIMNET crewed M1 simulator to the HLA Platform Proto-Federation (PPF) using version 0.33 of the prototype Run Time Infrastructure (RTI). This paper presents the redesigned production Gateway, which translates between DIS and the Real-time Platformlevel Reference (RPR) FOM. The Gateway uses a direct object-oriented interface to the RTI. Testing has shown that the average translation latency within the Gateway is less than 2 milliseconds.