Accession Number : ADA319156

Title :   Offensive Fog Water Attack Reduces Firefighting Time and Heat Strain during Shipboard Firefighting.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA

Personal Author(s) : Hagan, R. D. ; Bernhard, R. D. ; Jacobs, K. A. ; Farley, J. P. ; Ramirez, L. R.

PDF Url : ADA319156

Report Date : SEP 1996

Pagination or Media Count : 19

Abstract : The goal of shipboard firefighting is to gain control of the fire threat and prevent its spread. Traditionally, this is accomplished using the direct (DIR) attack method. In this approach water is applied to the base of the fire as either a straight-stream or narrow-angle fog. However, this approach is not advantageous for fires shielded by obstructions, fires with multiple fire sources, or fires of low visibility. Normally, heat, smoke, and gases associated with these types of fires do not prevent entry into the fire space. However, these conditions can force firefighters from the fire space and/or prolong the time required to locate the fire. Use of a fog (FOG) attack method, where a medium angle fog is delivered upward onto the overhead burning gases, has the potential to maintain the thermal balance of the overhead gas layer and improve visibility. These benefits should allow firefighters to locate more rapidly the seat of the fire and extinguish the flames. However, controversy surrounds use of the FOG attack method because of its potential to create steam and possibly increase heat strain and risk of heat-related injuries. The purpose of this study was to compare the use of two shipboard firefighting attack methods, direct (DIR) straight-steam water and fog (FOG), on firefighter heat strain.

Descriptors :   *CONTROL, *WATER, *ATTACK, *FOG, *SHIPBOARD, *FIRE FIGHTING, *BOAT AND SHIP SAFETY, *SHIP FIRES, *FIRE PREVENTION, SOURCES, THREATS, GASES, REDUCTION, TIME, SMOKE, VISIBILITY, STEAM, HEAT BALANCE, JET STREAMS.

Subject Categories : Marine Engineering
      Safety Engineering
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE