Virtual-Reality techniques are employed in various applications ranging from engineering and en-tertainment to scientific research and education-training. The complexity found in many projects in ship industry has led several researchers to employ virtual reality techniques in various phases of ship design, construction and operations. Ship’s dynamic behavior is a problem of significant com-plexity and it affects passengers’ locomotion ranging from simple walking and stair-climbing under normal to hectic movement in emergency situations, e.g., evacuation. The aim of the present work is to develop a scalable multi-user virtual-reality (VR-) environment for interactively investigating passengers’ locomotion considering dynamic ship-motion effects.