| abstract | - SM U-28 or U-XXVIII was a U-27 class U-boat or submarine for the Austro-Hungarian Navy. U-28, built by the Austrian firm of Cantiere Navale Triestino (CNT) at the Pola Navy Yard, was launched in January 1917 and commissioned in June. She had a single hull and was just over in length. She displaced nearly when surfaced and over when submerged. Her two diesel engines moved her at up to on the surface, while her twin electric motors propelled her at up to while underwater. She was armed with two bow torpedo tubes and could carry a load of up to four torpedoes. She was also equipped with a deck gun and a machine gun. During her service career, U-28 sank the British Q ship Bradford City and nine other ships, sending a combined tonnage of to the bottom. U-28 was surrendered at Venice in 1919, granted to Italy as a war reparation and broken up the following year.
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