The Imprisonment in the Ice and Escape

The Imprisonment in the Ice and Escape is the most sustained and desperate ordeal in the Nautilus's voyage, a six-day crisis that reduces the ship's crew to the edge of asphyxiation and forces Captain Nemo to deploy every resource of his submarine—engineering, brute force, and sheer will—against the implacable pressure of the Antarctic ice. The event transforms the Nautilus from a vessel of exploration into a tomb of frozen water and foul air, and it reveals the limits of even Nemo's power when nature itself becomes the adversary.

Causes and Background

The crisis begins not as a navigational error but as a consequence of the Nautilus's triumphant return from the South Pole. After Captain Nemo claims the pole on March 21, 1868, the ship heads north under the Ice Bank, cruising at a depth of 1,000 feet and a speed of fifteen miles per hour. The panels in the lounge remain closed as a precaution against submerged blocks of ice. On the night of March 23–24, at three o'clock in the morning, a violent collision awakens Professor Aronnax. The Nautilus has been struck by an enormous iceberg that has toppled over—its center of gravity shifted by warmer waters or repeated collisions—and the block slides under the hull, lifting the ship and heeling it sharply to starboard. The Nautilus is no longer aground but trapped: above, below, and around it, impenetrable frozen walls seal off every passage. Captain Nemo informs Aronnax that this is not an incident but an accident, caused by nature's unpredictability rather than human incapacity. The ship lies at a depth of 360 meters, listing badly, with furniture overturned and pictures hanging askew.

The Dual Threat: Crushing and Asphyxiation

Captain Nemo calmly outlines the two ways of dying that face them: crushing by the contracting ice or asphyxiation as the air runs out. The Nautilus's provisions will last longer than the crew, so starvation is not an immediate concern. The air tanks, however, can supply oxygen for only two more days, and the ship's atmosphere is already growing foul after thirty-six hours without renewal. Nemo decides to attack the thinnest wall of ice—the lower surface, where only ten meters separate the ship from open water. He grounds the Nautilus on the icy bottom at 350 meters, and a dozen crewmen, including Ned Land, don diving suits and begin digging a trench eight meters from the port quarter. The work is brutally slow: each twelve-hour shift removes only one meter of ice, meaning the task will require five nights and four days—far longer than the air supply can last. The water temperature is -6° to -7° centigrade, and the side walls of the trench begin to close in as the liquid strata farthest from the workmen solidify. Nemo acknowledges this new danger but insists their only chance is to work faster than the water freezes.

The Boiling Water Intervention and the Final Gamble

As the air inside the Nautilus becomes unbreathable, Captain Nemo resorts to a desperate expedient: injecting boiling water into the surrounding sea to delay its freezing. The ship's distilling mechanism heats water to 100° centigrade, and the pumps send it into the icy water outside. After three hours, the exterior temperature rises from -7° to -6°, then to -4°, and finally to -1° centigrade—just above the freezing point of salt water. This prevents the ice from contracting further and crushing the hull, but it does nothing to solve the air shortage. By March 27, six meters of ice have been removed, but four meters remain, requiring another forty-eight hours of work. The air tanks are nearly empty; the little oxygen left is saved for the workmen. Aronnax, Conseil, and Ned Land are reduced to gasping, half-conscious states. On the sixth day, Nemo decides that picks are too slow and orders the Nautilus to be raised from its icy bed, towed above the trench, and then filled with 100 cubic meters of water—adding 100,000 kilograms of weight. The ship settles onto the remaining one-meter-thick ice, and the extra weight cracks the barrier. The Nautilus plunges through like a cannonball, then immediately expels the ballast water and speeds northward. At the moment of breakthrough, the hatches are torn open, and waves of clean air flood the ship.

Consequences and Aftermath

The escape from the ice leaves the crew alive but profoundly shaken. Aronnax, Conseil, and Ned Land owe their survival to the self-sacrifice of their companions, who saved the last atoms of oxygen from a Rouquayrol device for the professor. The ordeal permanently alters the mood on board: Ned Land's patience is exhausted, and his determination to escape hardens into obsession. Captain Nemo, though he retains his composure throughout, emerges from the crisis more withdrawn and gloomy than before. The Nautilus itself suffers no structural damage, but the event marks a turning point in the voyage—the first time the ship's invulnerability has been so thoroughly tested. The ice prison also foreshadows the final catastrophe: the Maelstrom that will ultimately tear the skiff from the Nautilus's hull. For Aronnax, the experience becomes a central memory of the voyage, a reminder that even the most advanced technology cannot fully conquer the natural world.