Safety, Fire & Survival · First Aid — Rule of Nines
The 'rule of nines' is used to estimate, for a burn casualty, the:
- ATime until sunset
- BNumber of rescuers required
- CDepth of the water
- DPercentage of total body surface area burned, to guide fluid needs and urgency✓ Correct
Explanation
The rule of nines assigns body regions multiples of 9% (e.g., each arm 9%, each leg 18%, front torso 18%) to estimate the total body surface area burned. Larger burned areas mean greater fluid loss and higher urgency for evacuation and treatment.
Authority: Ship Captain's Medical Guide
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