Pedzisa mutsara unotevera: Iyo Type "UB I" submarine (dzimwe nguva inozivikanwa se "UB-1" kirasi "") yaive kirasi yemabhoti madiki emahombekombe (U-mabhoti) akavakwa kuGerman pakutanga kweHondo Yenyika Yekutanga. Ngarava 20 dzakavakwa, zhinji dzadzo dzakapinda mubasa neGerman Imperial Navy. Ngarava dzechirongwa ichi dzaishandiswawo neAustro-Hungarian Navy (Kaiserliche und Königliche Kriegsmarine "kana" K.u.K. Kriegsmarine) uye
Mauto Emvura eBulgaria. Muuto rehondo reAustria neHungary, rainzi 'the'.