The Type UB I submarine was a class of small coastal submarines (U-boats) built in Germany at the beginning of the First World War. Twenty boats were constructed, most of which went into service with the German Imperial Navy Boats of this design were also operated by the Austro-Hungarian Navy and the Bulgarian Navy. In the Austro-Hungarian Navy, it was called the U-10 class.
SM UB-46 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-46 operated in the Mediterranean and the Black Seas, and was sunk by a mine in December 1916.
The Mediterranean U-boat Campaign in the Mediterranean Sea was fought by Austria-Hungary and German Empire against the Allies during World War I. It was characterised by the ability of the Central Powers to raid with near impunity during the first years of the war, causing substantial shipping losses, until the introduction of the convoy system allowed the Allies to drastically cut their losses from 1917 on.
SM UB-43 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-43 was sold to the Austro-Hungarian Navy during the war. In Austro-Hungarian service the B was dropped from her name and she was known as SM U-43 or U-XLIII as the lead boat of the Austro-Hungarian U-43 class.
SM UB-45 was a Type UB II submarine or U-boat built for and operated by the German Imperial Navy during World War I. UB-45 operated in the Mediterranean and the Black Seas, and was sunk by a mine in November 1916.
SM UB-44 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-44 operated in the Mediterranean and disappeared in August 1916.
SM UB-42 was a Type UB II submarine or U-boat for the German Imperial Navy during World War I. UB-42 operated in the Mediterranean and the Black Seas during the war. She was broken up at Malta in 1920.
SM UB-14 was a German Type UB I submarine or U-boat in the German Imperial Navy during World War I. The submarine was also known by the Austro-Hungarian Navy designation of SM U-26.
SM UB-3 was a German Type UB I submarine or U-boat in the German Imperial Navy during World War I. She disappeared on her first patrol in May 1915, and was the first of her class to be lost.
SM UB-6 was a German Type UB I submarine or U-boat in the German Imperial Navy during World War I. The submarine was interned after running aground in neutral Dutch waters, and was scuttled by her crew at Hellevoetsluis.
SM UB-7 was a German Type UB I submarine or U-boat in the German Imperial Navy during World War I. She disappeared in the Black Sea in September 1916.
SM UB-8 was a German Type UB I submarine or U-boat in the German Imperial Navy during World War I. She was sold to Bulgaria in 1916 and renamed Podvodnik No. 18, and was the first ever Bulgarian submarine.
The U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies. It took place largely in the seas around the British Isles and in the Mediterranean. The German Empire relied on imports for food and domestic food production and the United Kingdom relied heavily on imports to feed its population, and both required raw materials to supply their war industry; the powers aimed, therefore, to blockade one another. The British had the Royal Navy which was superior in numbers and could operate on most of the world's oceans because of the British Empire, whereas the Imperial German Navy surface fleet was mainly restricted to the German Bight, and used commerce raiders and unrestricted submarine warfare to operate elsewhere.
The Pola flotilla was an Imperial German Navy (IGN) formation set up to implement the U-boat campaign against Allied shipping in the Mediterranean during the First World War in support of Germany's ally, the Austro-Hungarian Empire. It was formed in 1915 from the previously established U-Halbflottille Pola. It operated mainly from an advanced base at Cattaro in the Adriatic, rather than from Pola.
The SM UB-48 was a German Type UB III submarine or U-boat in the German Imperial Navy during World War I. It was commissioned into the German Imperial Navy on 11 June 1917 as SM UB-48.
The Flanders U-boat flotillas were Imperial German Navy formations set up to prosecute the U-boat campaign against Allied shipping in the Western Approaches during the First World War. Originally operating as a flotilla, it was split in two during the latter part of the war.
SM UB-49 was a German Type UB III submarine or U-boat in the German Imperial Navy during World War I. She was commissioned into the German Imperial Navy on 28 June 1917 as SM UB-49.
SM UB-51 was a German Type UB III submarine or U-boat in the German Imperial Navy during World War I. She was commissioned into the Pola Flotilla of the German Imperial Navy on 26 July 1917 as SM UB-51.
SM UB-52 was a German Type UB III submarine or U-boat in the German Imperial Navy during World War I. She was commissioned into the Pola Flotilla of the German Imperial Navy on 9 August 1917 as SM UB-52.
SM UB-53 was a German Type UB III submarine or U-boat in the Imperial German Navy during World War I. She was commissioned into the Pola Flotilla of the German Imperial Navy on 21 August 1917 as SM UB-53.
