Two. Cases not trained as specialists. But having seen the victims If people drowned near and deep space. The apparatus. Where you are in the stand stable .
2. If you have not been successful so far, but the skill training to meet victims if someone drowned in deep water areas and is close to aid you in where stands stable. .
2.In case of not have been until the coaching skills, but have met the victims if the people in the water near and deep water area, use the device, you are in a stable, standing.