Abstract: During immersion in cold water, there is a very clear chronology with regard to cooling of the tissues of the body. Firstly, during head-out immersion, the skin is cooled, followed by cooling of the superficial nerves and musculature and finally of the deep tissues. The stages of immersion in cold water associated with particular risk were first outlined by Golden and Hervey  and are directly related to the cooling of these tissues.
Citation: Tipton, M., & Golden, F. (2014). The physiology of cooling in cold water. In Drowning (pp. 843-848). Springer, Berlin, Heidelberg.