 The three Type UB I boats of the Constantinople Flotilla seem to have patrolled primarily in the Black Sea . UB @-@ 8 was transferred to the Bulgarian Navy in May 1916 , and UB @-@ 7 disappeared in the Black Sea in October 1916 , leaving UB @-@ 14 as the sole remaining German Type UB I in the flotilla ; she was surrendered at Sevastopol in November 1918 to French armies stationed there during the Russian Civil War . 
 The three Type UB I boats of the Constantinople Flotilla seem to <a href='been_done' title='1'><mark>have</mark></a> patrolled primarily in the Black Sea . UB @-@ 8 was transferred to the Bulgarian Navy in May 1916 , and UB @-@ 7 disappeared in the Black Sea in October 1916 , leaving UB @-@ 14 as the sole remaining German Type UB I in the flotilla ; she was surrendered at Sevastopol in November 1918 to French armies stationed there during the Russian Civil War . 
Da three Type UB I boats of the Constantinople Flotilla seem to done patrolled primarily in the Black Sea . UB @-@ 8 was transferred to the Bulgarian Navy in May 1916 , and UB @-@ 7 disappeared in tdaBlack Sea in October 1916 , leavin UB @-@ 14 as the sole remaining German Type UB I in thdalotilla ; she was surrendered at Sevastopol in November 1918 to French armies stationed there durin the Russian Civil War .