Available for inboard vessels.

Similar to the Propeller Mounted Systems, lines are wound down to the propeller hub and cut before the next revolution. However, the Shaft Mounted Systems is clamped on the shaft, riding on its inertial force with a blade hydroplaning on a Kevlar/Teflon bearing and is held stationary by a wedge holding block which is installed on the strut held by three screws. Watch these examples below: