For most of modern oceanographic history, the scientific consensus held that waves exceeding 9 metres were essentially impossible. When French naval officer Jules Dumont d'Urville reported 33-metre waves in the Indian Ocean in 1826, he was publicly ridiculed by his colleague Francois Arago. The mathematics seemed to agree with the skeptics: the Gaussian statistical model used to predict wave heights since the nineteenth century suggested that a 30-metre wave in a 12-metre sea state might occur once in 10,000 years. The problem, as author Susan Casey noted, was that the people who encountered 100-foot rogue waves generally were not coming back to tell anyone about it. The evidence was mostly wreckage and silence.

Everything changed on January 1, 1995. A laser sensor on the Draupner gas platform in the North Sea recorded a wave 25.6 metres tall in a sea state with a significant wave height of about 12 metres, more than double its neighbors. The instruments were cross-checked and confirmed. Here was a wave that should not have existed according to any standard model, caught in the act by a machine that could not be accused of exaggeration or hysteria. The scientific community took notice. By 2004, the European Space Agency's MaxWave project had used satellite radar to identify more than ten individual waves exceeding 25 metres in just three weeks of observation over a limited area of the South Atlantic. Rogue waves were not rare anomalies. They were happening everywhere, all the time.

Rogue waves are defined as waves whose height exceeds twice the significant wave height, which is itself the average of the largest third of waves in a given sea. They are distinct from tsunamis, which are long-wavelength waves caused by seismic events and are often barely noticeable in deep water. A rogue wave is a surface phenomenon, born from the interaction of wind, current, and the nonlinear behavior of water itself. One leading theory involves modulational instability, where a normal wave begins drawing energy from its neighbors, briefly growing to monstrous proportions before collapsing. Research in 2019 at the Universities of Oxford and Edinburgh recreated the Draupner wave in a laboratory, demonstrating that waves meeting at angles greater than 60 degrees can produce vertical jets that actually increase rather than diminish wave height at the breaking point.

The human cost of rogue waves is written in the records of vessels that simply disappeared. The cargo ship MS Munchen, a state-of-the-art vessel with multiple watertight compartments, was lost with all hands in 1978. The only wreckage recovered was a lifeboat whose mounting pins had been bent backward by a wave striking from fore to aft, at a height of at least 20 metres above the waterline. The MV Derbyshire, at 91,655 gross register tons the largest British ship ever lost at sea, sank in Typhoon Orchid in 1980. A forensic investigation concluded that a rogue wave had overwhelmed the ship's cargo hatches, which were designed to withstand only 2 metres of water, with a force more than ten times the design load. Professor Douglas Faulkner's 2001 analysis linked the loss directly to the emerging science of freak waves.

The 2020 Ucluelet wave, recorded on Amphitrite Bank just 7 kilometres offshore, brought rogue wave science into popular conversation. Its ratio of 2.93 times the significant wave height made it one of the most proportionally extreme waves ever measured by a buoy. The event generated both excitement and controversy in the scientific community, as researchers debated whether it truly set records. A 2004 event in the Black Sea, recorded by a high-precision Waverider buoy, had produced a wave 3.91 times the significant wave height, and a 2006 reading off Coos Bay, Oregon suggested a ratio of 5.38. What the Ucluelet wave did accomplish was this: it reminded the world that the ocean remains capable of producing forces that no ship design fully accounts for, and that these forces can appear and vanish in minutes, leaving nothing behind but data on a buoy.