What should you do if you fall overboard into coldwater?

If you fall overboard into cold water, try to remain calm and assess your situation. Focus on keeping your head above water and conserve energy by adopting a vertical position, using the "HELP" position (Heat Escape Lessening Posture) to minimize heat loss. If possible, signal for help and try to swim towards the nearest vessel or shore, but avoid excessive movement that can lead to fatigue. Remember to keep your airway clear and try to stay as still as possible to retain body heat.