Hi montalvo transport,
You can load containers ONTO "Vermaas" but not unload them. You can also load containers onto the inland container vessel. In both cases you can do this by means of the container crane. You can however load and unload containers onto and off a number of other of other vessels by making them appear on the vessel or on the quayside by the vessel. This is done by using the mission editor to build this into a mission. I will not go into detail here but if you study the editor you can learn how it is done. There are a number of missions, both in the "Missions" & the "Custom missions" (which can be downloaded) where these operations can be simulated.
Regards,
Traddles.