I'd seen that one before but only in the water, also wondered what the owner had been drinking. :ambivalence:
Strange, I know, but look again at the prop, it's a conventional prop, not a fan type thruster blade.
I'm only guessing but it looks like it operates like as a pod-drive with hydraulic rotational control, not just lateral.
The idea, I think is for holding station, fishing or wreck diving not just a bow thruster???