 While UB @-@ 7 's construction neared completion in early March 1915 , Enver Pasha and other Turkish leaders were pleading with their German and Austro @-@ Hungarian allies to send submarines to the Dardanelles to help attack the British and French fleet pounding Turkish positions . The Germans induced the Austro @-@ Hungarian Navy ( German : Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine ) to send two boats — its own Germaniawerft @-@ built boats U @-@ 3 and U @-@ 4 — with the promise of UB @-@ 7 and UB @-@ 8 as replacements . 
