Hypothermia
| IF THE WATER TEMPERATURE (F) IS: | EXHAUSTION OR UNCONSCIOUSNESS | EXPECTED TIME OF SURVIVAL IS: |
| 32.5 | Under 15 Minutes | Under 15 - 45 Minutes |
| 32.5 - 40.0 | 15 - 30 Minutes | 30 - 90 Minutes |
| 40.0 - 50.0 | 30 - 60 Minutes | 1 - 3 Hours |
| 50.0 - 60.0 | 1 -2 Hours | 1 - 6 Hours |
| 60.0 - 70.0 | 2 - 7 Hours | 2 - 40 Hours |
| 70.0 - 80.0 | 3 - 12 Hours | 3 Hours - Indefinitely |
| OVER 80.0 | Indefinitely | Indefinitely |
The use of an Immersion Suit or other buoyant
thermal protective device will greatly enhance survival time.
Chart is for general reference only.
Hypothermia Facts
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Body thermal conductivity in water is 26 times faster than when exposed to air. If you have a life raft, board as soon as possible.
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50 degree water equals 15 minutes before incapacity and/or unconsciousness with life jacket on.
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50 degree water equals 9 minutes before incapacity and/or unconsciousness without a life jacket.
Chart and facts courtesy of Winslow Life Raft Company