Nyorai kuenderera kweiyi ndima - Mumatanho mashanu mubasa rake remwedzi mitanhatu, "UB-45" yakanyudza ngarava ina dze. Pakuvamba kwaNovember 1916, "UB-45" yakanga ichibva pachiteshi paVarna, Bulgaria, apo U-boat yakarova chimbambaira ndokunyura nokukurumidza. Gumi nevashanu vevarume makumi maviri vaive muchikepe vakaurawa mukurwiswa; mumwe wevashanu vevashandi vakanunurwa kubva ku "UB-45" akazofa kubva mukukuvara kwake. "UB-45" yakaparara yakawanwa ndokusimudzwa neBulgaria Navy
muma1930 nechinangwa chokuvakazve ngarava yepasi pegungwa. Mainjiniya anobva kuAG Weser akasarudza kuti kudzorerwa kwechikepe chepasi pegungwa kwaibvira, asi izvi hazvina kumboitwa. Zvinhu zvakasara zvakatorwa mumarara zvakavigwa muVarna mushure mekutungamirirwa kwemariro kuburikidza neguta munaNovember 1938.