Rowing in Cold Water

When air is below 40 degrees and/or water below 50 degrees, keep launch within 100 yards of all shells.
In these conditions hypothermia can set in quickly
Be aware of the dangers of cold water immersion and the symptoms of hypothermia.  Hypothermia occurs when a victim is subject to cold temperatures, cold water, ice or snow. There is potential danger for hypothermia when the water temperature is below 80 degrees and very dangerous when the water temperature is below 50 degrees. Symptoms include feeling cold, turn bluish and shivering, and followed by numbness, apathy, lethargy, disorientation and loss of mental capacity.
Action if cold and shivering:
a. Get out of the water quickly, even on top of the capsized boat. Heat loss is 25 times greater when in the  water.
b. Huddle with others
c. Drown-proofing (dead man’s float) is not an acceptable survival technique. Keep as much of the body out  of the water as possible.
d. Move to shelter quickly, remove wet clothing and re-warm body. In mild hypothermia conditions, re-  warm in a shower, tub or with warm blankets.
e. Do not give any liquids to drink, treat for shock.
f. Continue to re-warm and always obtain medical assistance as soon as possible.
More info on treatment:  http://www.webmd.com/first-aid/hypothermia-treatment or check out Cold Water Facts by the Water Safety Congress