U27 24 Feb 1917

Constructed in Budapest and transferred to Pola by rail.

Damaged by torpedo Japanese destroyer Sakaki off Cerigo 11 Jun 17.

Sank British destroyer Phoenix 13 May 1918 in Strait of Otranto. Sank seven small Greek sailing ships, including Dragonos, off Cape Rodoni 20 Sep 1918.

To Italy; b/u at Fiume 1920.