Voith Schneider "Propeller" (VSP), also "cycloidal Drive"

Aidan Lee posted, cropped
Blades instead of props. The Ocean A. Gauthier tractor tug showing her 6’ long voith blades that provide responsive thrust in any direction with her Voith Schneider unconventional propulsion.
Lorry Smith: Seattle at one time had tug boat races . The Foss tug with this system would win going sideways.
Douglas Semack: https://youtu.be/Pao8fj3jsls?si=BhV4PbEH-_ebFBp9
The VSP powered Tugs are extremely powerful.

7:07 video @ 1:51
It can go from full forward to full reverse in 5 seconds.

Note the propwash coming from underneath the pilothouse on the lead tugboat. I presume that it has a Voith Schneider "Propeller" (VSP) rather than a standard screw propeller. Or maybe it is a bow mounted Z-drive.

1:32:55 video @ 1:18:04 via Dennis DeBruler