GULF OF THE FARALLONES NATIONAL MARINE SANCTUARY — As the 45-foot-white catamaran “Kitty Kat” bobbed in the ocean near the Farallon Islands last month, Jackie Dragon dropped a hydrophone overboard to ...

The propellers of the world's ships and boats create a constant drone that disrupts ocean life. New propeller designs based on loops could one day quiet that drone and be more fuel efficient. Sharrow ...

Oscar Propulsion Limited and the University of Strathclyde have come up with a way to reduce underwater radiated noise from ship propellers. According to Oscar Propulsion, its patented PressurePores ...

Belgian underwater repair specialist Hydrex says it is carrying out more modifications to a ship’s underwater areas and equipment in addition to the company’s more common damage rectification work.

Building a large ship requires a massive amount of engineering work. Even the smallest parts require lots of time and effort to design and build. Case in point: the ship's propeller. The prop has to ...