ISBN: | 978-5-5106-8072-0 |
High Quality Content by WIKIPEDIA articles! 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.