U-1305 was built at the Flensburger Schiffbau-Gesellschaft shipyard in Flensburg, near the Danish border, as yard number 498. Ordered on August 1, 1942, her keel was laid on July 30, 1943, and she was launched on July 11, 1944. The Type VIIC/41 was a refined version of the workhorse Type VIIC that had formed the backbone of Germany's submarine fleet. The improvements were incremental rather than revolutionary: a slightly lighter pressure hull that allowed a deeper operating depth of up to 230 meters, while maintaining the same armament and general dimensions. At 67 meters long with a surface displacement of 769 tonnes, she carried five torpedo tubes, fourteen torpedoes, an 8.8 cm deck gun, and anti-aircraft weapons. Her crew numbered between forty-four and fifty-two men.

Two Germaniawerft F46 supercharged diesel engines powered U-1305 on the surface, driving her at up to 17.7 knots. Submerged, two AEG double-acting electric motors took over, pushing her at a maximum of 7.6 knots -- fast enough to maneuver into an attack position, but far too slow to escape a determined escort. Her surfaced range of 8,500 nautical miles at 10 knots was impressive on paper, but by 1944 the surface was the most dangerous place for a U-boat. Allied aircraft carried radar that could detect a submarine's conning tower, and the Bay of Biscay transit routes that U-boats had once crossed routinely had become killing grounds.

U-1305's operational career was brief. On April 24, 1945 -- with Hitler still in his bunker as Berlin fell to Soviet forces -- U-1305 torpedoed and sank the Monmouth Coast, a British merchant vessel of 878 gross register tons. It was the submarine's only confirmed kill. The sinking occurred in the final days of the war at sea, when some U-boat commanders continued to fight while others quietly sought opportunities to surrender. The Monmouth Coast and her crew became casualties of a war that was already over in every strategic sense, victims of a submarine operating under orders from a regime that no longer functionally existed.

On May 10, 1945 -- two days after V-E Day -- U-1305 surfaced and surrendered at Loch Eriboll on the far northern coast of Scotland. The remote sea loch, surrounded by barren Highland terrain, had been designated as a collection point for surrendering U-boats. Over the course of May 1945, thirty-three submarines made the same journey to Loch Eriboll, their crews following orders to surface, fly a black flag, and submit to Allied boarding parties. U-1305 was transferred to Lisahally in Northern Ireland on May 14, joining the growing fleet of captured submarines that the Allies would study, divide among themselves, and ultimately destroy.

U-1305 represents a particular chapter in the U-boat war: the boats commissioned too late to matter. Of the roughly 1,160 U-boats that put to sea during the war, 785 were lost -- a casualty rate of nearly 68 percent. About 30,000 of the 40,000 men who served in U-boats died, the highest casualty rate of any branch of any military service in the war. The late-war boats like U-1305, built at enormous cost in labor and scarce materials, entered service into a battle that had already been decided. Their crews sailed knowing that Allied anti-submarine warfare had achieved a level of effectiveness that made every patrol a likely death sentence. That U-1305 survived to surrender was, statistically, the exception rather than the rule.