SM UB-143 [SEP] vessel class
SM UB-143
SM "UB-143" 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 3 October 1918 as SM "UB-143".
She was surrendered to Japan on 1 December 1918 and served in the Imperial Japanese Navy until 1921, when she was broken up in Yokohama.
Construction.
Built by AG Weser of Bremen in one year of construction, "UB-143" was launched at Bremen on 21
with a deck-mounted machine gun. "UB-13" was broken into sections and shipped by rail to Antwerp for reassembly. She was launched in March 1915 and commissioned as SM "UB-13" in April.
"UB-13" spent her entire career in the Flanders Flotilla and sank 11 merchant ships, about half of them British fishing vessels. In March 1916, "UB-13" was responsible for sinking the Dutch ocean liner , raising the ire of the Dutch public. "Tubantia" was the largest neutral vessel sunk during