Off My Chest: The fact that a tug has flanking rudders does NOT mean that you MUST use them for EVERY maneuver! Flanking rudders are great to have in many situations, but do you need to use them for docking the boat? NO. Do you need to use them for simply landing a small barge against a pier with no current and only a light breeze? NO. If you do these things, you’re the workboat equivalent of yachtie who uses his bow thruster constantly and unnecessarily JUST BECAUSE IT’S THERE.
In closing, flanking rudders allow boats to walk in ways that boats without them cannot, and to apply full backing bell on both engines while steering by directing thrust, which tugs without flanking rudders cannot do, but there are a great many maneuvers which can be done perfectly without using the flankers by anyone who’s competent at handling a twin screw tug. Goddamn.