Came here to post the same. The Wikipedia article is impressive. > At 175 ft (53 m) the submersible jolted to a stop – held at the maximum length of the nylon

Came here to post the same. The Wikipedia article is impressive. > At 175 ft (53 m) the submersible jolted to a stop – held at the maximum length of the nylon towline. The crew swung about in the sea currents until the rope snapped. The pilots immediately closed down all the electrical systems which left the sub in total blackness. They also managed to release a 400 lb (181 kg) lead ballast weight as they descended. They impacted the sea floor at 9:30 a.m., at a speed later judged to be at 40 mph (18 m/s; 64 km/h).[5][13]