In "Dead Wake: The Last Crossing of the Lusitania," Erik Larson highlights how Room 40 significantly enhanced Britain's naval capabilities during World War I. This intelligence unit played a crucial role in deciphering enemy communications, which provided critical insights into German naval movements and strategies. As a result, Britain was able to adapt its approach to maritime warfare effectively, focusing on securing dominance over the seas.

The shift in Britain's strategy was pivotal, as control of the seas was vital to ensuring supply lines and maintaining military operations. Room 40's intelligence work not only informed tactical decisions but also shaped broader wartime policies, demonstrating the importance of information and strategy in naval conflicts. This change allowed Britain to leverage its resources more effectively and assert its power on the global stage.