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 ...

Over the years the Hydrex R&D department has continuously improved underwater repair techniques to make it possible for Hydrex diver/technicians to perform permanent repairs on seals, thrusters, ...

Hydrex diver/technicians straighten the propeller blades of a large container ship moored off Diego Garcia in the Indian Ocean With all five blades of its propeller severely bent, a 290-meter ...

Imagery released today by Northrop Grumman provides a close up view of one of the two rear propellers of the Manta Ray UUV (uncrewed underwater vehicle). Just a few hours after a new 360° video of the ...

Just when you think you’ve seen all the gorgeous helices in the world, here comes another one. This one trails behind propellers underwater. What causes this helical structure to form? And why is it a ...