In the presented situation, seeing the injured person with his head submerged in the water, should you leave him unmoved for fear of injuring his spine?

Why?

The injured person is lying with his face submerged in water and is at risk of drowning. Keeping the airway open takes priority over restricting movement because of a suspected spinal injury. Carefully reposition him while supporting his head and neck, get his face clear of the water and check his breathing.