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 TM 55-1905-223-10
b. Tunnel. This manually actuated system is designed and installed to protect the Tunnel and
bilge (3-17-0-Q), Frame 17 to 25. The physical location of this system, less FM-200 distribution
piping and nozzles, Electric Horn/Strobe, and Warning Light (Amber Strobe), is installed outside
of
the protected space. One (1) each 350 pound FM-200 cylinder and supporting components,
installed on the 7'0" off centerline longitudinal bulkhead, Port side, Frames 26 to 27, Engine
Room (3-25-0-E), provide protection for the Tunnel and bilge.
c. Bow Thruster Room. This manually actuated system is designed and installed to protect the
Bow Thruster Room and bilge (3-5-0-E), Frames 5 to 17. The physical location of this system,
less FM-200 distribution piping and nozzles, Electric Horn/Strobe, and Warning Light (Amber
Strobe), is installed outside of the protected space. One (1) each 350 pound FM-200 cylinder
and
upporting components, installed on the 7'0" off centerline longitudinal bulkhead, Port side,
Frames
19 to 20, Tunnel (3-17-0-Q), provides protection for Bow Thruster Room and bilge.
d. Paint Locker. This manually actuated system is designed and installed to protect the Paint
Locker (1-0-2-Q), Frames 0 to 13. The physical location of this system, less FM-200 distribution
piping and nozzle and FM-200 Siren, is installed outside the protected space. One (1) each 125
pound FM-200 cylinder and supporting components, installed on the 7'0" off centerline
longitudinal
bulkhead, Port side, Frame 10, Bow Thruster Room (3-5-0-E), provide protection for the
Paint Locker.
e. A/C and Emergency Generator Room. This manually activated system is designed and
installed to protect the A/C and Emergency Generator Room (1-43-0-E), Frames 42 1/2 to 52.
The physical location of this system, less FM-200 distribution piping and nozzles, Electric
Horn/Strobe, and Warning Light (Amber Strobe), is installed outside of the protected space. One
(1) each 125 pound FM-200 cylinder and supporting components, installed in the Stowage
Locker (1-43-1-Q), Frames 43 to 44, provides protection for A/C and Emergency Generator Room.
1-48. Water Washdown System (WWS). The WWS built of all stainless components are three (3)
separate systems installed in the Engine Room, Tunnel, and Bow Thruster Room. The WWS is a
hydrogen fluoride (HF) gas mitigation, water washdown system (WWS) which provides general overhead
coverage to the protected spaces. The WWS is a simple overhead sprinkler grid which is piped directly
to the existing firemain. It receives seawater from the Bow Thruster Emergency Fire Pump (Engine
Room WWS) and two (2) Engine Room Fire Pumps (Bow Thruster Room and Tunnel WWS). The Bow
Thruster Emergency Fire Pump is powered by the Bow Thruster diesel engine and the two (2) Engine
Room Fire Pumps are powered electrically from the Ships Service Switchboard 240 V Distribution Panel.
The WWS, upon activation, serves to:
- Quickly reduce the temperature within the protected space.
- Minimize production of Hydrogen Fluoride (HF) Gas which is produced as a result of FM-200
agent decomposition in contact with hot surfaces and flame at temperatures above 1300oF.
- Aid in scrubbing of any HF Gas generated.
- Expedite ventilation of the protected space.
Change 10
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