SS Principessa Mafalda was an Italian transatlantic ocean liner built for the Navigazione Generale Italiana (NGI) company. Named after Princess Mafalda of Savoy, second daughter of King Victor Emmanuel III, the ship was completed and entered NGI's South American service between Genoa and Buenos Aires in 1909. Her sister ship sank immediately upon launching on 22 September 1907.
On 25 October 1927, while off the coast of Brazil, a propeller shaft fractured and damaged the hull. The ship sank slowly in the presence of rescue vessels, but confusion and panic resulted in 314 fatalities out of the 1,252 passengers and crew on board the ship. The sinking resulted in the greatest loss of life in Italian shipping and the largest ever in the Southern Hemisphere in peacetime, with the ship that was called "the Italian Titanic".
Early history
Principessa Mafalda was built at Cantiere Navale di Riva Trigoso with her sister, Principessa Jolanda, which capsized and sank at her launch on 22 September 1907. Principessa Mafalda was launched on 22 October 1908 without her superstructure installed in order to avoid the same accident. She was finally completed on 30 March 1909 and became the flagship of the NGI. In 1910, she played a part in developing long-distance radio communication when Guglielmo Marconi conducted experiments on board.
Specifically designed for voyages between Genoa and Buenos Aires, Principessa Mafalda was considered the best ship on this route for several years, travelling at a relatively rapid 18 knots. Her amenities included a two-story ballroom and spacious cabins in Louis XVI style. On the eve of World War I, on 22 August 1914, she made her one and only voyage between Genoa and New York City. During the war, she was requisitioned by the Italian Royal Navy and housed officers at Taranto. She resumed her prewar South American service in 1918. She remained the NGI's flagship until 1922, when the assumed the role. By 1926 the Mafalda had made over 90 long but uneventful round trips.
On 10 January 1920, the ship was reported missing due to hitting a mine with a full loss of life. Two days later, it sent a radio signal that it was safe and was proceeding as normal.
Last voyage and sinking
On 11 October 1927 Principessa Mafalda sailed from Genoa for Buenos Aires with intermediate stops scheduled at Barcelona, Dakar, Rio de Janeiro, Santos, and Montevideo. The ship was under the command of Captain Simone Gulì, with 971 passengers and 288 crew aboard. She also carried 300 tonnes of cargo, 600 bags of mail, and 250,000 gold lire destined for the Argentine government. The trip was to take 14 days.
It soon became apparent that the ship was in poor condition. Principessa Mafalda left Barcelona almost a day late due to mechanical problems, and several times, she slowed to a complete stop on the high seas, sometimes for hours. Water in bathrooms became intermittent. A refrigeration system failure caused tons of food to spoil, resulting in numerous cases of food poisoning. At the stop at Cape Verde, Captain Gulì telegraphed the company to request a replacement vessel but was told, "Continue to Rio and await instructions." With the ship resupplied with fresh food and partially repaired, he took her out onto the Atlantic.
By 23 October, Principessa Mafalda had developed a small but noticeable list to port. The passengers, who had received few explanations for the previous breakdowns, now began to worry that the ship was taking on water. Although far behind schedule, she was finally traveling at full steam off the coast of northern Brazil on the 24th. Life aboard flowed more quietly, with the longest part of the journey nearly complete. On crossing the Equator, a line-crossing ceremony was organized on deck with orchestra music and a huge cake.
Around 17:15 hours on 25 October 1927, near the Abrolhos Archipelago, off Salvador de Bahia, Brazil, the ship was rocked by several strong shudders. Passengers were initially assured that this was only due to the loss of a propeller and the situation was not dangerous. However, on the bridge, the engineer reported that the starboard propeller shaft had indeed fractured, but it had also traveled off its axis and cut a series of gashes in the hull. Complicating matters, the watertight doors could not be fully closed. At 17:35, Captain Gulì sounded the alarm and ordered the radio officer to send SOS. He also stated this was merely a precaution as he believed his ship could stay afloat until the next day. Two ships, the (British) and (Dutch), arrived quickly. With clear weather and rescue nearby, the situation seemed to be under control.