HMS’09. 2009. This paper presents a simulation-based instructional system for harbor crane operators training. The configurable design of the simulator allows the training of several crane types: Quay-Side Gantry, Rubber Tired Gantry, Mobile, Reach-Stacker and Ro-Ro tractor. In this paper the simulator architecture, the Virtual Reality techniques, the projection system, the configurable cabin and the instructional design are described. The virtual environment design includes the representation of harbor terminals, container ship load and unload operations, mobile crane driving and bulk material handling. The simulator includes an automatic evaluation system that measures the trainees’ evolution in terms of their abilities. The instructor’s panel gives full control on the exercise and on many parameters such as weather conditions, crane failures or load distribution during the simulation. The system also includes an advanced debriefing system for exercise revision and evaluation.