 <unk> @-@ 9 was initially assigned to the Baltic Flotilla , and was joined by <unk> @-@ 2 and <unk> @-@ 5 in early 1916 . All three became training boats at Kiel in 1916 , joining <unk> @-@ 11 in that duty . Little information is available about the Type <unk> I boats operating in the Baltic . 
