 After U @-@ 3 's arrival at Pola in January 1909 , she was commissioned into the Austro @-@ Hungarian Navy on 12 September 1909 as SM U @-@ 3 . During the evaluation of the U @-@ 3 class conducted by the Navy , the class ' poor diving and handling characteristics were noted . To alleviate the diving problems , U @-@ 3 's fins were changed in size and shape several times , and eventually , the front diving planes were removed and a stationary stern flap was affixed to the hull . U @-@ 3 served as a training boat between 1910 and 1914 and made as many as ten cruises per month in that capacity . 
 After U @-@ 3 <a href='null_genetive' title='1'><mark>'s</mark></a>arrival at Pola in January 1909 , she was commissioned into the Austro @-@ Hungarian Navy on 12 September 1909 as SM U @-@ 3 . During the evaluation of the U @-@ 3 class conducted by the Navy , the class <a href='null_genetive' title='2'><mark>'</mark></a>poor diving and handling characteristics <a href='uninflect' title='3'><mark>were</mark></a> noted . To alleviate the diving problems , U @-@ 3 <a href='null_genetive' title='4'><mark>'s</mark></a>fins <a href='uninflect' title='5'><mark>were</mark></a> changed in size and shape several times , and eventually , the front diving planes <a href='uninflect' title='6'><mark>were</mark></a> removed and a stationary stern flap was affixed to the hull . U @-@ 3 served as a training boat between 1910 and 1914 and made as many as ten cruises per month in that capacity . 
After U @-@ 3  arrival at Pola in January 1909 , she was commissioned into the Austro @-@ Hungarian Navy on 12 September 1909 as SM U @-@ 3 . durin the evaluation of da U @-@ 3 class conducted by the Navy , tdaclass  poor diving and handling characteristics was noted . To alleviate the diving problems , U @-@ 3  fins was changed in size and shape several times , and eventually , thdaront diving planes was removed and a stationary stern flap was affixed to thedall . U @-@ 3 served as a training boat between 1910 and 1914 and made as many as ten cruises per month in that capacity .