Churchill Bar­ri­er #2, link­ing Lamb Holm and Glimps Holm, Scapa Flow. On 14 Octo­ber 1939, in a dar­ing feat of sea­man­ship, Gün­ther Prien nav­i­gat­ed U-47 into Scapa to tor­pe­do HMS Roy­al Oak. On Churchill Tour VII Lord Jel­li­coe, son of the great Admi­ral, accom­pa­nied our vis­it to Scapa, includ­ing a view of Roy­al Oak on the bot­tom, rev­er­ent­ly pre­served as a war memo­r­i­al . (BillC, Wiki­me­dia Cre­ative Commons)