 In addition , four of the German Type UB Is assigned to the Pola Flotilla based at the Austro @-@ Hungarian Navy 's main naval base at Pola were assigned Austro @-@ Hungarian designations . 
 In addition , four of the German Type UB Is assigned to the Pola Flotilla based at the Austro @-@ Hungarian Navy <a href='null_genetive' title='1'><mark>'s</mark></a>main naval base at Pola <a href='uninflect' title='2'><mark>were</mark></a> assigned Austro @-@ Hungarian designations . 
In addition , 4 of the German Type UB Is assigned to da Pola Flotilla based at the Austro @-@ Hungarian Navy  main naval base at Pola was assigned Austro @-@ Hungarian designations .