• when the German U-boat UB-8 was transferred to the Bulgarian Navy in May 1916, she became the first ever Bulgarian submarine?
• when torpedoed in May 1915 by German submarine UB-8, SS Merion was disguised as the Royal Navy battlecruiser HMS Tiger?

Facts on topics related to SM UB-8

SM UB-14

• the first three ships attacked by German U-boat SM UB-14—the Italian cruiser Amalfi and British troopships Royal Edward (pictured) and Southland—were all among the largest ships hit by U-boats during the First World War?

German Type UB I submarine

• the World War I German U-boat UB-2 was the only one of the Type UB I submarines in the Flanders Flotilla not to be shipped by rail to Antwerp?
• when German U-boat UB-3 disappeared on her first patrol in May 1915, she was the first of her class to be lost?

SM UB-6

• it took two German submarines, UB-6 and UB-16, to dispatch two World War I Royal Navy recruits?

SM UB-3

• when German U-boat UB-3 disappeared on her first patrol in May 1915, she was the first of her class to be lost?

SM UB-10

• World War I German U-boat UB-10 was credited with sinking 23 ships in a 13-day span in July and August 1915?
• the German hospital ship Ophelia was seized by the British Navy as a spy ship in 1914 only to be torpedoed and sunk by German U-boat UB-10 a year later?

SM UB-4

• German U-boat UB-4 was sunk in August 1915 by a fishing smack?

SM UB-2

• the World War I German U-boat UB-2 was the only one of the Type UB I submarines in the Flanders Flotilla not to be shipped by rail to Antwerp?