with separate forward and astern propulsion power units, e.g. turbines

Full Title

Transmitting power from propulsion power plant to propulsive elements (adaptation of transmission to allow adjustment in direction of propellers B63H5/125; transmission between wind motors and propulsive elements B63H13/00; in outboard propulsion units B63H20/14; adaptation of transmission to allow adjustment of location of propellers B63H20/08) > with mechanical gearing > for transmitting drive from more than one propulsion power unit > for alternative use of the propulsion power units > with separate forward and astern propulsion power units, e.g. turbines