The footage made the story available to a global audience. It also made a single moment stand for the whole. Subsequent reporting — the December 2013 wave of longer articles, the later documentary coverage, the follow-up interviews — worked against the flattening by filling in what the footage left out. But the footage remained the primary reference point for most people who knew about the Jascon-4 story.
## Oxygen, Nitrogen, and the Body Under Pressure
The diving medicine principles that governed Okene’s extraction from the Jascon-4 are worth explaining in some additional detail, because they illustrate both why the rescue was professionally managed rather than improvised, and why the specific expertise of the DCN Diving team mattered in a way that goes beyond the initial discovery.
Human physiology at depth is governed by Henry’s Law, which describes how gases dissolve in liquids under pressure: at greater pressure, more gas dissolves into a given volume of liquid. The blood and tissues of a human body behave, from the perspective of gas physics, as liquids — they absorb dissolved gases in proportion to the partial pressure of those gases in the breathing air.
For a diver breathing air at 30 meters (four atmospheres), the partial pressure of nitrogen in the breathing air is four times its surface value. Over the course of a standard recreational or commercial dive — typically measured in minutes or a few hours — this produces a calculable amount of nitrogen absorption that standard decompression tables address through planned ascent stops. Over sixty-plus hours at depth, the nitrogen absorption is a saturation-level exposure that is qualitatively different from what standard dive tables are designed to handle.