Ark No'4 is one of nine planned Arks to be built and designed to carry a large amount of humanity, animals, and whatever is needed to be kept alive during the global catastrophe. This large, heavy vessel was intentionally built for the American contingent, commandeered by Captain Michaels himself.
After the 2010 G8 Summit, the world national leaders began a top secret project to ensure humanity survives the upcoming apocalypse in 2012. Thousands of workers were recruited to build large ships called Arks to save more than 400,000 people. Ark 4 was being constructed and was made to be the American Ark, with Ark 3 being the Canadian Ark. Ark 4 was completed in late 2012, with other three Arks being completed, but the rest were still under construction.
During the evacuation, Ark 3 was permanently shut down due to slow repairs in its roof during the shifting of Earth's plates. Although the American flagship had the American flag on it, there were Chinese, Nepali, American and even Russians that have been left behind, instigating a riot to board the Arks as soon as the Ark was rolled out of the open blast shield doors, along with the other two Arks.
Upon the impact of the tidal wave, Air Force One was caught in the tidal wave and slammed into the hull, knocking off the starboard anchor. The long amount of time used up by the delay caused seawater to flow in, causing a flood in the aft parts of the ship. Even in the mechanisms, the gears (which have been caused by an impact driver that Jackson and his group were using to stow away, got jammed, resulting in Gordon's death) have disabled the systems for a while, leaving the Ark helplessly turning to the right and grinding with the ark carrying the European/ Asian contingents.
The failed startup of the engines knocked the vessel off course, leading to it helplessly floating towards Mount Everest. Before the hulk of floating metal could bury itself into the slope and oncoming avalanche, the engines were successfully started once the impact driver was removed, backing the ark up, and was able to sail away from the flooded Himalayas.
27 days into the voyage and after the apocalypse ended, Ark 4 was able to re-establish contact with their foreign contingents and head to find land. When time was reset to year one, the global floodwaters from the tsunamis began to recede, with the entire African continent risen up (which did not suffer extreme damage), it allowed the 2012 survivors to rebuild humanity anew. Ark 4 and the other two remaining Arks prepare to set sail for the risen continent.