 The German Imperial Navy ordered its first fifteen Type UB I boats on 15 October 1914 . Eight boats — numbered UB @-@ 1 to UB @-@ 8 — were ordered from Germaniawerft of Kiel , and seven boats — numbered UB @-@ 9 to U @-@ 15 — from AG Weser of Bremen . After two of the class , UB @-@ 1 and UB @-@ 15 , were sold in February 1915 to ally Austria @-@ Hungary ( becoming U @-@ 10 and U @-@ 11 in the Austro @-@ Hungarian Navy ) , the German Imperial Navy ordered UB @-@ 16 and UB @-@ 17 from Weser . A further three for Austria @-@ Hungary — U @-@ 15 , U @-@ 16 , and U @-@ 17 — had been ordered from Weser by April , bringing the total number constructed to 20 . 
 The German Imperial Navy ordered its first fifteen Type UB I <a href='uninflect' title='1'><mark>boats</mark></a> on 15 October 1914 . Eight boats <a href='uninflect' title='2'><mark>—</mark></a> numbered UB @-@ 1 to UB @-@ 8 — <a href='uninflect' title='3'><mark>were</mark></a> ordered from Germaniawerft of Kiel , and seven boats — numbered UB @-@ 9 to U @-@ 15 — from AG Weser of Bremen . After two of the class , UB @-@ 1 and UB @-@ 15 , <a href='uninflect' title='4'><mark>were</mark></a> sold in February 1915 to ally Austria @-@ Hungary ( becoming U @-@ 10 and U @-@ 11 in the Austro @-@ Hungarian Navy ) , the German Imperial Navy ordered UB @-@ 16 and UB @-@ 17 from Weser . A further three for Austria @-@ Hungary — U @-@ 15 , U @-@ 16 , and U @-@ 17 — <a href='been_done' title='5'><mark>had</mark></a> been ordered from Weser by April , bringing the total number constructed to 20 . 
Da German Imperial Navy ordered its first fifteen Type UB I boat on 15 October 1914 . Eight boats ——ed numbered UB @-@ 1 to UB @-@ 8 — was ordered from Germaniawerft of Kiel , and seven boats — numbered UB @-@ 9 to U @-@ 15 — from AG Weser of Bremen . After two of the class , UB @-@ 1 and UB @-@ 15 , was sold in February 1915 to ally Austria @-@ Hungary ( becoming U @-@ 10 and U @-@ 11 in tdaAustro @-@ Hungarian Navy ) , the German Imperial Navy ordered UB @-@ 16 and UB @-@ 17 from Weser . A further three for Austria @-@ Hungary — U @-@ 15 , U @-@ 16 , and U @-@ 17 — done been ordered from Weser by April , bringing thdaotal number constructed to 20 .