SS Principe Umberto

History
Name:	SS Principe Umberto
Namesake:	Prince Umberto
Owner:	Navigazione Generale Italiana
Port of registry:	Genoa
Builder:	Cantieri Navali Riuniti, Palermo
Yard number:	13
Completed:	April 1909
Fate:	sunk by U-5, 8 June 1916
General characteristics
Tonnage:	7,838 GRT
Length:	145.1 m (476 ft 1 in) (pp)
Beam:	16.3 m (53 ft 6 in)
Propulsion:	2 × quadruple expansion steam engines
Speed:	16 knots (30 km/h)

SS Principe Umberto was an Italian passenger and refrigerated cargo ship built in 1908 for Navigazione Generale Italiana. During World War I, Principe Umberto served as an armed merchant cruiser. While transporting troops in the Adriatic in June 1916, the ship was sunk by Austro-Hungarian U-boat U-5 with the loss of 1,926 men.

It was the worst naval disaster of World War I in terms of human lives lost.

Principe Umberto was built in 1908 by Riuniti in Palermo for Navigazione Generale Italiana, a company that sailed to Mediterranean and Black Sea ports, as well as passenger service to North and South America. She was 145.1 meters (476 ft 1 in) long (pp) with a beam of 16.3 meters (53 ft 6 in). She was powered by two quadruple expansion steam engines that moved her at up to 16 knots (30 km/h).

Principe Umberto's routes and early activities are not known, but during World War I, the ship was employed as an armed merchant cruiser to transport men and materiel in support of Italy. On 8 June 1916, Principe Umberto and another transport, the Ravenna, were carrying the 55th Infantry Regiment (col. Ernesto Piano) back from Albania to Italy, under the escort of the Italian scout cruiser Libia and four Regia Marina destroyers. The Austro-Hungarian U-boat U-5, under the command of Friedrich Schlosser, launched a torpedo attack that successfully hit the Italian ship.Principe Umberto went down quickly with the loss 1,926 men (1,750 according to other sources).

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