On December 1961, off the coast of California, USS Scamp (SSN-588), was performing sea trials at a depth of 400 ft when her shaft snapped just 11 inches outside of the pressure hull. She lost her screw and had to be towed back to Mare Island by USCGC Comanche. https://ift.tt/PlCpHgk https://ift.tt/vJZe10h