 In June 1917, the boats were decommissioned, handed over to Austria-Hungary, and then commissioned into the Austro-Hungarian Navy in July.The "B" in the designation of both boats was dropped, but the submarines retained the same numbers, becoming "U-43" and "U-47" under the Austro-Hungarian flag.At the end of the war and were ceded to Italy and France, respectively, and had been scrapped by 1920.