"This experimental vessel has not been approved or certified by any regulatory body and could result in physical injury, emotional trauma or death."
The five missing men aboard Titan, the OceanGate submersible that got lost on its way to the Titanic wreckage earlier this week, each signed a waiver stating exactly that before embarking on what could now be the last journey they ever take, according to CBS journalist David Pogue.
But is the document binding?
