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Physiological responses during shipboard firefighting

B L Bennett1, R D Hagan, G Banta

  • 1Naval Health Research Center, San Diego, CA, USA.

Aviation, Space, and Environmental Medicine
|March 1, 1995
PubMed
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U.S. Navy firefighters experience rapid increases in core temperature (Tre), skin temperature (Tmsk), and heart rate (HR) during shipboard firefighting. Findings quantify heat strain limits for personnel in extreme heat environments.

Area of Science:

  • Environmental Physiology
  • Occupational Health
  • Naval Operations

Background:

  • Shipboard firefighting presents extreme thermal challenges.
  • U.S. Navy personnel require specialized protective gear for fire combat.
  • Understanding heat strain is critical for operational safety and performance.

Purpose of the Study:

  • To quantify the physiological heat strain experienced by U.S. Navy firefighters.
  • To assess the impact of firefighting ensembles on thermal load.
  • To determine the limits of heat tolerance during shipboard fire scenarios.

Main Methods:

  • Nine male volunteers participated in simulated shipboard firefighting tests.
  • Core temperature (Tre), mean skin temperature (Tmsk), and heart rate (HR) were continuously monitored.

Related Experiment Videos

  • Environmental conditions, including extreme compartment air temperatures, were recorded.

    • Main Results:

    • Both Tmsk and Tre rose rapidly during active firefighting, with Tmsk increasing faster than Tre.
    • Peak average values included Tre of 39.2°C, Tmsk of 39.5°C, and HR of 186 bpm.
    • Significant body heat storage (HS) was observed, reaching 2.02 kcal.kg-1.

    Conclusions:

    • Shipboard firefighting imposes severe heat stress on personnel.
    • The study provides quantitative data on physiological responses to extreme heat.
    • Findings help define tolerance limits for Navy firefighting operations.