The UB 91 was launched in March 1918 and under¬took two patrols under the command of KapLt Wolf Hans Hertwig, sinking five vessels in total. Following her surrender and charity tour after the war, the UB 91 was scrapped in Briton Ferry in 1921.

This document was brought to the attention of the U-Boat Project 1914-18 by Brian Rendell who kindly allowed us to share it.