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 TM 55-1905-223-10
WARNING
The Water Washdown System (WWS), installed to augment
the tunnel FM-200 System, shall be activated prior to actuation
of the FM-200 Fixed Fire Extinguishing System.
To provide adequate flow of seawater to the tunnel, the (2) engine
room fire pumps must be operated at a minimum pressure of 96
psi.
During operation of the WWS, sufficient fire main capacity exists
for four (4) 1 " fire hoses at full stream or nine (9) 1 " hoses
at spray.
Failure to operate engine room fire pumps at 96 psi could result in
equipment damage or serious injury to personnel.
The WWS should always be ready to immediately deploy by
disengaging the locking mechanism on the ball valve handle.
Pad locking of this handle should only occur during system
maintenance or equipment damage, death or serious injury
could occur.
Activate the WWS by unlocking and opening valve WWS-1, Tunnel WWS Control Station,
located in the Engine Room (3-25-0-E), Starboard side, watertight bulkhead 25. Refer to
(3) Secure Ventilation. Secure powered ventilation to the protected space. This can be
accomplished locally at the motor-controller if the situation allows during the evacuation
process, at the FM-200 Storage Cylinders located in the Engine Room MCC Area by manually
lifting the plunger located on top of the FM-200 pressure switch, or by shutdowns that will occur
automatically during FM-200 system actuation.
Ensure the following Powered Ventilation system is secured: Tunnel Supply Fan SF-3.
REMEMBER An actual fire emergency is not the time to train to
perform these procedures!
Secure the following openings to the protected space:
NOTE
The responsibilities to perform these space preparations listed have been
identified on the LCU-2K station bill for fire and damage control conditions
and crew members should routinely train for these responsibilities
OPENING
LOCATION
Tunnel Supply Fan SF-3 Cover
Main Deck Weather Area (1-0-0-WEA), Port
Side Bulwark, Frame 28
Tunnel Vent Watertight Closure (Aft
Below Main Deck, Watertight Bulkhead 25
P/S)
Tunnel Vent Watertight Closure (Fwd)
Below Main Deck, Starboard Side, Watertight
Bulkhead 17
Tunnel Watertight Door
Below Main Deck, Starboard Side, Watertight
Bulkhead 25
2-726
Change 10
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