 UB @-@ 9 was initially assigned to the Baltic Flotilla , and was joined by UB @-@ 2 and UB @-@ 5 in early 1916 . All three became training boats at Kiel in 1916 , joining UB @-@ 11 in that duty . Little information is available about the Type UB I boats operating in the Baltic . 
 UB @-@ 9 was initially assigned to the Baltic Flotilla , and was joined by UB @-@ 2 and UB @-@ 5 in early 1916 . All three became training boats at Kiel in 1916 , joining UB @-@ 11 in that duty . Little information <a href='drop_aux' title='1'><mark>is</mark></a>available about the Type UB I <a href='uninflect' title='2'><mark>boats</mark></a> operating in the Baltic . 
UB @-@ 9 was initially assigned to da Baltic Flotilla , and was joined by UB @-@ 2 and UB @-@ 5 in early 1916 . All three became training boats at Kiel in 1916 , joining UB @-@ 11 in dat duty . Little information available about the Type UB I boat operating in tdaBaltic .