In the event of an implosion, such as the collapse of a submarine hull, the inward movement occurs at an astonishing speed of approximately 1,500mph (2,414km/h), equivalent to 2,200ft (671m) per second. This information comes from Dave Corley, a former US nuclear submarine officer, who has extensive knowledge on the subject.
The duration of the complete collapse is incredibly brief, lasting only one millisecond, or one thousandth of a second. To put this into perspective, a human brain instinctually responds to a stimulus in approximately 25 milliseconds, while the rational response time from sensing to acting is believed to be around 150 milliseconds.
It is worth noting that the air inside a submarine contains a relatively high concentration of hydrocarbon vapours. When the hull collapses, the air auto-ignites, resulting in an explosion following the initial rapid implosion. As a result, human bodies are incinerated and turned to ash and dust instantaneously.
In conclusion, the implosion of a submarine hull is a catastrophic event that occurs at an unimaginable speed, with devastating consequences.
