Fatigue during ice rescue is four hours under which conditions?

• A. Winds >30 knots, temperature below 10°C, or transiting thin ice
• B. Winds <20 knots
• C. Temperature above 20°C
• D. Standing on shore

Answer: (A)

Fatigue during ice rescue is driven by environmental stressors that increase heat loss and physical strain. When winds are strong (more than 30 knots), the body loses heat faster and you must work harder to move through wind and spray, which wears you out quicker. Cold temperatures (below 10°C) amplify cold exposure, raising the risk of hypothermia and speeding up fatigue. Transiting thin ice demands more careful, strenuous movements to avoid breaking through, adding physical and mental stress that reduces endurance. Under these conditions, a four-hour fatigue window is a realistic limit. In calmer, warmer conditions with solid ice, fatigue would not reach this four-hour mark as quickly.