Penshurst fought a number of engagements against German U-boats during her service .
Was successful on two occasions , destroying UB - 19 in November 1916 , and UB - 37 in January 1917 .
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 .