Otto Piening GmbH, a member company of the DEUTSCHE YACHTEN working group, is venturing for the first time into the development of controllable pitch propellers that can be operated using a water-based hydraulic system in place of oil. This environmentally-friendly, world-first has now been certified by classification society DNV GL and approved for the megayacht market as well as for research, naval and coastguard vessels. More than two million pitch adjustment cycles under full…