When spiffy, high-tech, high-performance propellers go into the prop shop, they’re carefully restored to their original shape with sophisticated, computerized propeller repair tools, right? Well, no.

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Last month Hydrex installed Propeller Boss Cap Fins (PBCF) on a 289-meter tanker during the vessel’s stop in Mokpo, South Korea. A Propeller Boss Cap Fins (PBCF) can recover energy loss of a propeller ...