He was picked up by a lifeboat. There is no mystery; he had made clear himself multiple times that this is how he was rescued.
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This story is about how stories, themselves, do not always get told accurately.
For me the most interesting aspect is that the original newspaper reporter altered the facts, and then some decades later, another researcher dug deeper and got the facts straight, long after the incident.
Contextually - in light of recent insanity regarding state sanctioned mass murder - this is quite relevant to those of us observing the state of information warfare.