Virtual Terminal 

The Virtual Terminal is a species of a simulation model of a real container terminal. It covers all processes around discharge, loading, transportation and stacking of containers. Contrary to a simulation model of the terminal it does not include the decision making out of the TOS. In fact the Virtual Terminal is coupled with the real TOS (or a test instance of it)  and all decisions are made by the TOS itself. Thus the Virtual Terminal may be seen as a test-bed for the TOS. The technical term of this technology is emulation instead of simulation.