The sea has always been a hostile environment and the decision to live and work upon it takes courage, skill, determination and good training. Occasionally, things do go wrong and in extreme event ship's crew may have to abandon their vessel and that could lead to person being immersed in water which could be very cold water. Under most conditions, the body maintains a healthy temperature. When more heat is lost than your body can generate, hypothermia can result. Hypothermia may develop within minutes of being exposed to cold weather conditions or it may take several hours depending on the water and wind temperatures.
Wearing the immersion suit could make all the difference - the difference between life and death. Immersion suits, also known as survival suits and abandonment suits, are intended for use in ship evacuations when rescue could be some time arriving. They are designed to save your life and since 1st of July 2006 it has been mandatory under SOLAS to provide immersion suits for every person on board cargo ships trading outside 20 deg. north or 20 deg. south. Understanding the correct procedure to put on, or don, the immersion suit, is extremely important. Hypothermia is a condition that is triggered when your body' temperature drops by just two degrees Celsius grade. As this happens, the body tries to protect itself. Circulation concentrates blood flow around the central part of the body and away from the arms and legs.
A person will start to shiver and then shake. This is the body attempting to heat itself up by muscular activity. As the temperature drops another couple of degrees, this muscular activity starts to fail. In northern latitudes, when the waters are colder, this can happen in just fifteen minutes to an unprotected person. By that time you will lose muscular control and start to lose the ability to think patiently - this could be irreversible and result in death. This situation need not arise if you know how an immersion suit works and are able to get into it correctly. It is very clever piece of kit that needs to be looked after. The suit is a one-piece item that is stored in a bag for easy access.