The successful rescue of a person who has apparently drowned depends largely on immediate action.
Initially, the casualty should be positioned face down with the abdomen supported over a buoyant object to allow swallowed water to drain naturally. Care must be taken to prevent the casualty from slipping or sustaining additional injuries.
The mouth and nose should then be cleared of any obstruction, tight clothing loosened, and artificial respiration started immediately if normal breathing has stopped.
Once spontaneous breathing returns, gentle massage of the limbs may help stimulate blood circulation. The casualty should be dried thoroughly, kept warm, and continuously monitored until professional medical assistance becomes available.