This work investigates the critical role and operational challenges of the British Merchant Navy in sustaining the nation during the Second World War. Captain S. W. Roskill, a distinguished naval historian and former officer, utilizes official records and strategic analysis to document the logistical strain placed on merchant shipping. The text examines the interplay between naval protection, convoy systems, and the constant threat posed by enemy submarine warfare throughout the conflict.

The subject matter points to a rigorous, scholarly examination of maritime logistics that serves as a foundational text for understanding the naval dimensions of the Second World War. The framing suggests a dense, authoritative account intended for historians and specialists interested in the strategic realities of wartime supply chains.