Hi again rlgerou,
The two files I attach will be of some help for you I hope. I should point out that "Jumbo Javelin" does now have a thruster near to amidships. Some of the small vessels, Lifeboat, pilot boats & water taxi have Hamilton jet drive power units. Unlike ordinary drive, these vessels when going astern, will turn in the direction the steering is pointing. This is the opposite of what you might expect with normal drive systems. The "Oceana" has two steerable azimuth drives (Azipods) and two non steerable ones as well as two bow thrusters. IF you have the inland traffic DLC the barges in there have a single steerable drive at the forward end which can rotate 3600
thus enabling them to be driven in any direction you choose. The Rotterdam ferry is a very complex drive system as has the "Red Eagle" ferry. I will try to find a picture of these systems for you. My suggestion is for you to pick a particular ship in "free roaming"mode and then experiment with her to see how she responds to her controls. I have found this to be a much better way of finding things out than trying to understand complex instructions.