Das Boot recap

A German naval correspondent joins an Atlantic U-boat patrol in late 1941 and records life under an experienced, skeptical captain. Long stretches of boredom, overcrowding, bad air, and violent weather are broken by attacks on convoys and terrifying hunts by Allied escorts. The crew torpedoes ships but is repeatedly driven deep by depth charges, making survival depend on discipline and the engineers' ability to keep failing machinery alive. After refueling covertly in neutral Spain, the captain is ordered through the heavily defended Strait of Gibraltar toward Italy. The attempt ends with the submarine crippled and lying on the seabed, but the crew makes extraordinary repairs and escapes. They return to La Rochelle only to be caught in an air raid at the base. Men who survived the patrol are killed, and the U-boat sinks in harbor as the correspondent watches the captain fall.

In occupied La Rochelle, a naval war correspondent meets the officers and sailors whose next patrol he will document. A night of heavy drinking before departure contrasts with the rigid routines waiting aboard. The U-boat is narrow, overloaded with provisions, wet, and almost devoid of privacy. The correspondent learns the hierarchy of the boat: the captain bears final responsibility, the watch officers manage operations, and the chief engineer controls the machinery on which every life depends. Once at sea, romantic ideas about submarine service give way to seasickness, diesel fumes, monotonous watches, and the constant effort required simply to move through the Atlantic without being found.

The boat searches for targets while storms and poor information frustrate the patrol. When contact with Allied shipping finally comes, the captain maneuvers for a torpedo attack and then dives to escape the escorts. Depth charges transmit each explosion through the pressure hull, leaving the crew unable to fight back or know whether the next blast will break the boat open. Mechanical faults, leaks, and human strain accumulate. Johann, normally absorbed in the engines, falters under the attack before recovering enough control to return to duty. The correspondent begins to understand that the crew's apparent roughness and humor are defenses against helpless waiting.

The patrol continues through severe Atlantic weather. Keeping watch on the exposed bridge becomes dangerous, while below decks wet clothing, spoiled food, sweat, and machinery foul the air. Further contacts bring another cycle of approach, attack, and evasion. The men hear the destruction caused by their torpedoes without seeing most of the people aboard the targets, then face escort vessels determined to destroy them. The captain's contempt for official optimism grows as messages from command reduce these encounters to tonnage and success reports. Survival increasingly depends on patience and on the crew's intimate knowledge of the submarine's sounds.

Low on fuel and supplies, the U-boat makes a covert rendezvous in neutral Spain. The brief contact with clean quarters, abundant food, and men outside the patrol emphasizes how degraded conditions aboard have become. Instead of being ordered directly home, the captain receives instructions to attempt the Strait of Gibraltar and proceed into the Mediterranean. He regards the passage as extraordinarily dangerous: Allied aircraft, ships, currents, and searchlights concentrate around the narrow route. Nonetheless, military orders leave little room to refuse. The replenished boat heads toward the strait, and the crew prepares for a mission many believe may prevent their return.

The captain attempts to pass Gibraltar under cover of darkness, but the submarine is detected and attacked from the air and surface. Damage deprives it of control, and the boat sinks far deeper than intended before striking the seabed. Water enters, pumps and motors fail, and the hull is exposed to pressure near its limits. With no external rescue possible, the chief engineer and crew work in filthy, dangerous conditions to stop flooding, restore power, and make the boat capable of rising. Air quality deteriorates while every repair consumes time. Their combined technical effort eventually expels enough water and restores enough machinery for the submarine to break free of the bottom and reach the surface.

Having survived Gibraltar, the damaged U-boat turns back toward France. The crew crosses the Atlantic exhausted but sustained by the prospect of home, and La Rochelle greets the returning boat with ceremony. The apparent conclusion is destroyed by an Allied air raid on the base. Bombs strike the harbor, killing and wounding men who had endured the entire patrol and sinking the submarine at its berth. The correspondent survives and witnesses the captain fall as the boat disappears in the harbor. The loss at the moment of return strips away any claim that their endurance produced victory or safety; the patrol ends with the same arbitrary destruction the men had both inflicted and escaped at sea.

After the near-fatal attempt to pass Gibraltar, the crew repairs the flooded and disabled submarine on the seabed and succeeds in bringing it back to the surface. The return through the Atlantic is a passage home by men who have already exhausted much of their physical and emotional reserve. They finally enter La Rochelle and receive the formal welcome due a boat that has survived its patrol. Safety lasts only moments. An Allied air raid strikes the base, killing and wounding members of the crew and sinking the submarine at its berth. The correspondent survives the attack and sees the captain collapse as the boat goes down in the harbor. The ending denies the patrol any triumphant meaning: skill and endurance brought the men home, but neither could protect them from the larger war once they arrived.