The development of advanced manned lunar systems requires increasing simulation fidelity to verify man/machine interfaces. Lockheed has been involved in the conceptual development of a mobile lunar laboratory and a small cabinless vehicle designed to transport an astronaut plus scientific equipment cargo on the moon. A lunar environment simulation test bed has been developed and is being utilized extensively to establish man's performance capabilities and limitations on the lunar surface. This simulation test bed includes a capability for testing the interactive effects of one-sixth gravity, lunar surface texture, the reduced pressure of vacuum and a treadmill for simulating extended walking tasks. Initial data obtained with the partial gravity simulator are presented.