In 1943, a troop transport ship operated by the Italian Royal Navy called the Francesco Crispi, was attacked by an enemy submarine of the cost of Corsica. The Crispi sank within 16 minutes, taking 945 of the 1300 men with it. More than 70 years after the tragic event, researchers surveyed the wreck at a depth of over 100 metres in Corsican waters. Using a wire-guided underwater robot that can descend to a depth of 1000 metres, investigations have brought new information to light and provide answers to the families of the men who were lost.