still doesn't change that the spearo's had no idea what to do in an event like this, they weren't even prepared for it, though the risk of shark attack is very low, what about the various sharp object they would have, spear guns for a start, knives, spare spear heads etc. The victim would have lost a lot less blood, had they had the proper first aid supplies, laid him down, kept him calm and elevated the limb, and stayed and waited for emergency services, the arguing and then subsequent bolt to heron island, being bashed about the boat would have done more harm than good, causing more blood loss and potentially more nerve and tissue damage.
People are always asking how much is your safety worth when it comes to epirbs, well what about a first aid cert and kit?? or even a a working radio.