Within 50 minutes the 650ft vessel had sunk to the bottom of the Bay of Gdańsk. Freezing temperatures, overcrowding and a shortage of lifeboats meant that of the estimated 10,000 passengers, only 500 survived; a figure that is seven times the number that died on the Titanic.
Ignoring rules of engagement S-13 continued to fire torpedoes at rescue ships. The captain of the Gustloff, predictably, managed to scramble to safety.
Today, the ship lies 42 metres below the ocean surface, marked as a maritime grave. Following the war S-13’s captain, Alexander Marinesko, fell out of favour with communist officials for a range of offences including drinking and being caught selling bricks on the black market. He was sentenced to hard labour in the Gulag and though released and undergoing a limited rehabilitation, he died in 1963 a broken man. In a final twist, Marinesko was awarded the honour of Hero of the Soviet Union 27 years after his death in 1990. A monument honouring him today stands the Russian enclave of Kaliningrad (formerly the German city of Königsberg), less than 200km away from the ship wreck and grave of the thousands he killed.