German U-boats under the Austro-Hungarian flag[1] Austro-Hungarian name German U-boat name(s) SM U-7 SM UB-7 SM U-8 SM UB-8 SM U-9 SM UB-3[4][Note 1] SM U-18 SM UC-14 SM U-19 SM UC-15 SM U-24 SM UC-12 SM U-25 SM UC-13 SM U-26 SM UB-14 SM U-33 SM U-33 SM U-34 SM U-34 SM U-35 SM U-35 SM U-36 SM U-21 SM U-47 SM U-37 SM U-32 SM U-38 SM U-38 SM U-39 SM U-39 SM U-42 SM UB-42 SM U-44 SM UB-44 SM U-45 SM UB-45 SM U-46 SM UB-46 SM U-54 SM UB-128 SM U-55 SM UB-129 SM U-56 SM UB-130 SM U-57 SM UB-131 SM U-58 SM UB-132 SM U-60 SM UC-20 SM U-62 SM UC-22 SM U-63 SM UC-23 SM UC-63 SM U-64 SM U-64 SM U-65 SM U-65 SM U-66 SM UB-66 SM UC-66 SM U-67 SM UB-67 SM U-68 SM UB-68 SM U-69 SM UB-69 SM UC-69 SM U-70 SM UB-70 SM U-71 SM UB-71 SM U-72 SM U-72 SM U-73 SM U-73 SM U-74 SM UC-34 SM U-75 SM UC-35 SM U-77 SM UC-37 SM U-78 SM UC-16 SM UC-38 SM U-79 SM UB-48 SM U-80 SM UB-49 SM U-81 SM UB-50 SM U-82 SM UB-51 SM U-83 SM U-63 SM UB-52 SM UC-20 SM UC-23 SM U-88 SM UC-24 SM U-89 SM UC-25 SM U-92 SM UC-73 SM U-93 SM UC-74 SM U-94 SM UC-52 SM U-95 SM UC-53 SM U-96 SM UC-54 SM U-97 SM UB-105 SM U-99 SM UC-103 SM U-110 SM UC-108 SM U-133 SM UB-133 SM U-134 SM UB-134 SM U-135 SM UB-135 SM U-146 SM UB-146 SM U-147 SM UB-147