When a boat has capsized in cold water what is the best way to prevent hypothermia?

When a boat capsizes in cold water, the best way to prevent hypothermia is to keep as much of the body as possible above water and minimize exposure. If possible, climb onto the hull of the capsized boat to stay out of the water. If staying on the boat isn't feasible, adopting the Heat Escape Lessening Position (HELP) by tucking the knees to the chest and keeping the arms close to the body can help conserve heat. Additionally, staying close to others can provide warmth through body heat.