On October 30, Russia’s sole remaining aircraft carrier, the Admiral Kuznetsov, lay nested inside PD-50—a huge 330-meter long and 79-meter tall floating drydock currently moored off the Roslyakovo dockyard near the city of Murmansk. That morning, the dock suddenly began tilting to one side, causing personnel to scramble for safety. One of its tall, seventy ton cranes smashed into the Kuznetsov’s hull near the waterline, tearing a 3.5 by 4.5-meter-sized gash into its flank. The other crane fell into the water.
The Kuznetsov remained buoyant, however, and a tug hastily pried 47,000-ton carrier away from the floating drydock, which submerged completely under the water in four hours.