If you think about the risk away. We see that oil drilling. It is a very heavy toll for workers. Boarding at stations to oil rigs at sea. There is also a risk of explosion or fire, the oil rig. The height of the oil rig, each of the elevation of the sea surface at least 30 meters of the explosion. Dispatches solution to the lives of working people have only one way this profession is bound sea. Considered a threat of injury is very serious.