Having suffered from a panic attack when scuba diving myself, I know how important the question about how to overcome panic when scuba diving is. Firstly, let your dive buddy know there’s something wrong. If the panic is caused by Nitrogen Narcosis, try ascending a few feet or a metre or so. Control your breathing, as this may stop the attack, but will help to conserve your air supply too. Mind distraction helps, really focus on what’s around you on the dive, get interested in what you can see. Ask yourself why you love scuba diving and focus on this aspect.