High class maritime simulators can be used to train the full ship environment. Simulators size can vary from a 6-degrees full motion simulator to a desktop workstation.
In maritime simulators you can teach various things like Bridge Team Management, Radar and ARPA, ECDIS, AIS, VTS, GMDSS. Ship operations like tug assistance in port or escorting and even AHTS. Dynamic Positioning Basic and Advanced courses approved by the Nautical Institute are run in the maritime simulators. More often ice conditions in simulations are used. Marine simulators can be used also for ship modeling as well harbour and fairways design.
Engine room and cargo handling simulators can be connected to modern bridge simulators to execute very massive operations.
We can say that heaven and your budget will set the limits for maritime simulators.
The biggest manufacturers today are Kongsberg http://www.km.kongsberg.com and Transas http://www.transas.com.