When you fall into cold water the initial threat is cold shock – heart rate, breath rate and breath volume spike dramatically. Cold water shock only lass for the first few minutes, but it can be deadly and there are a few things you can do to improve your chances of survival.
- 1. Try to remain calm and focus on your breathing, as the cold water shock will only last for a few minutes.
2. Keep your airway clear of water. This is where a PFD will help keep your head above the surface of the water. If not wearing a PFD then stay still and float, human body less dense than water and air in your clothing will help you float. Float, rest and recover from the initial cold water shock.
3. You survived the cold water shock response, but you are losing grip strength and speed of movement in your fingers, and this will progress to limb movement and coordination. It’s better to stay still because exercise causes you to cool more quickly. If you need to take action, use your legs as enormous amount of heat is lost through the arms when you start exercising. If you are in a group, get together for warmth, if by yourself get into the fetal position, with your knees to your chest to preserve warmth. Try to stay warm as you await rescue.
You generally do not die directly from hypothermia, but instead lose consciousness, followed by swim failure and drown. This is why a PFD is critical as you wait for a rescue.
When pulling someone out of the water, try to pull them out horizontally, rather than vertically, as horizontally reduces the risk of blood pressure collapse and you fainting and falling back into the water. Once onboard, keep the person immobilized, lying horizontal and try to keep them warm using blankets or articles of clothing.
The number one thing to remember, don’t fall in the water. Always have one hand on the boat, lifelines and jacklines tight and in good condition. Wear a harness and tether and always clip in when sailing in rough sea conditions.