HMS Penshurst was a Royal Navy warship that was active during World War I.She was a Special Service Vessel (also known as Q-ships) whose function was to act as a decoy, inviting attack by a U-boat in order to engage and (if possible) destroy it.Penshurst fought a number of engagements against German U-boats during her service, and was successful on two occasions, destroying UB-19 in November 1916, and UB-37 in January 1917. Penshurst was sunk following an action with U-110 in December 1917.