Every motorboat owner has a tale of hitting a submerged obstacle or boat ramp and damaging a propeller. Typically metal, it must be removed and taken to a prop repair shop, then sandblasted, bent, ...
The Controllable Pitch Propeller (CPP) Hub of the 'USS Taylor' (FFG 50) was replaced underwater in Souda Bay, Greece, the warship having earlier suffered significant damage to its propeller blades ...