Following the conclusion of World War II, Operation Deadlight was initiated to deal with the captured German U-boats that were surrendered to the Allies. By the end of the operation, a total of 121 U-boats were scuttled, with only 33 remaining intact for various purposes, including examinations for military intelligence. The operation was primarily carried out by the British Royal Navy, which sought to eliminate the potential for these vessels to be returned to service or to be repurposed for use by other states. The scuttling operations occurred mainly off the coast of Scotland near the Orkney and Shetland Islands, utilizing naval ships and support vessels for the task. In addition to ensuring the destruction of the U-boats, the operation also served to showcase the Royal Navy's capabilities in post-war naval operations. The U-boats, once a formidable component of the German naval strategy, had been a source of significant concern during the war. Their destruction not only marked the end of a military era but also involved various logistical elements, such as transport and the involvement of many naval crews. Some of the U-boats were sunk using explosives, whereas others were scuttled through flooding or demolition charges. Another notable aspect of the operation involved the potential for salvage. During Operation Deadlight, some of the boats were evaluated for their design and technology. This research into the advanced submarine technologies at the time laid the foundation for post-war submarine development by various nations. Overall, Operation Deadlight symbolized the transition from conflict to peace and the careful consideration of naval resources following the war's aftermath.