The journey of the Nautilus took a harrowing turn on the morning of March 22nd. While navigating beneath an iceberg, the vessel was rocked by a "violent shock" at 3:00 AM, throwing the narrator into the middle of his room. The ship was left "lying on its side, perfectly still," and the interior of the saloon was in disarray, with furniture overturned and pictures hanging crookedly. Ned and Conseil, the narrator’s companions, joined him in the saloon, expressing grave concerns about whether the ship would ever "right herself" again. Upon checking the "manometer," the narrator was shocked to discover they were "more than a hundred and eighty fathoms down," indicating a precarious depth.
When Captain Nemo finally appeared, his usual proud demeanor was replaced by "signs of worry." He confirmed that the Nautilus had suffered a "serious" accident. According to the Captain, the disaster was not the result of human error but a phenomenon of nature: a massive "mountain of ice had turned over," colliding with the ship. This trapped the Nautilus in a dangerous position, forcing it to rise alongside the shifting iceberg. Nemo warned of the terrifying possibility that the ship could be "crushed between the two mountains of ice" if the situation did not improve.
For a brief period, hope flickered as the Nautilus showed signs of recovering. The narrator observed the pictures in the saloon "returning to their normal positions," signaling that the ship had begun to straighten. Emerging onto the platform, the crew witnessed a "dazzling wall of ice" forming a "perfect tunnel." Initially, it seemed that escape was possible by simply navigating out of this ice corridor. However, this relief was short-lived. A subsequent collision with a "block of ice" forced the Nautilus to reverse, and the navigation became increasingly complex as the ship remained "more than 300 feet down."
The situation turned dire at twenty-five minutes past eight, when a "second shock" occurred from behind. The narrator, sensing the gravity of the situation, confronted Captain Nemo to confirm their fate. The Captain admitted that the shifting of the iceberg had closed off their exit routes: "our path is now blocked in the south" and "every open spot is now blocked." The narrative concludes on a somber note, with the realization that the Nautilus and her crew are officially "trapped" within the frozen, subterranean depths of the ocean, leaving their future in total uncertainty.