Nothing to do with hindsight, if he thought the diver he saw was his buddy, he should have checked for accuracy when out of the water, since it was a troubled dive with buddy separation.
So Castillo swims to shore to check on the diver who he thinks is Gauci. The diver who visibly appears fine, and who not calling for help.
I'm not suggesting Castillo did the perfect thing, but rather his mistake is one many of us could have reasonably made. I'm also sure some percentage of us, without knowledge of this story, would have shouted her name from a distance to be sure. The question is whether a a) reasonable person could have made that mistake, and b) whether that had a causal factor in her death.
Hindsight implies there is no duty of buddy divers to take mutual responsibility for the safety of the buddy pair above and below the water.
I'm not sure I follow. How does
hindsight imply
no duty of [mutual responsibility]?
What I'm saying is
to fairly judge a person's actions from a moral or legal perspective, one must remove the benefit of hindsight. That means we must only consider what they knew at the time, their condition, and the amount of time they had to make any decision(s). In other words, put yourself in their shoes and allow for the fact that we all make mistakes or imperfect decisions.
If you look up legal definitions of neglect, it tends to follow the same pattern or ideas. One of the articles quoted/translated Malta's definition of neglect, which closely aligns with the one in the US.
From an "Accident & Incident" perspective, I'm all for abusing hindsight in order to establish better standards, suggestions, recommendations, redundancies, etc in the pursuit of safety.