You can sidestep twin-screw ferries with bowthruster and the engines. For sidestepping of the PoR in SS08 to port for example, you used to set the bowthruster at 70% to port, the port engine set 20% ahead and starboard engine 20% astern.
In ShipSim Magazine Issue 6 March 2010 there was a page about manoeuvring of the PoR, I am posting this article here.
But what are the rules of thumb about setting the throttles and bowthrusters in SSE for sidestepping very well? I talk about setting the bow thrusters and engines to the right value for sidestepping of the following ships:
- Esperanza;
- Pride of Rotterdam;
- Albatros IV;
- Coastguard Cutter;
- Protector.