The 1-2-3 of rescue. Save yourself first, your partner second, and the victim last. It's tragic that he died. You aren't supposed to go down more than 1/3 of y

The 1-2-3 of rescue. Save yourself first, your partner second, and the victim last. It's tragic that he died. You aren't supposed to go down more than 1/3 of your air supply so you have the same amount to get back with plus a third for emergencies. In addition, he was literally carrying extra oxygen tanks. I don't know the full story, but from what I understand, he wasn't fouled -- just ran out of air. In that case, it seems like he put the victims ahead of himself by acting recklessly and paid the price.