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 TM 55-1925-273-10-2
OPERATOR'S MANUAL
INLAND AND COASTAL LARGE TUG (LT)
OPERATION UNDER UNUSUAL CONDITIONS
INTERIM NUCLEAR, BIOLOGICAL, AND CHEMICAL (NBC) DECONTAMINATION PROCEDURES
INITIALSETUP:
References:
STP 21-1-SMCT
AR 70-71
WP 0071 00 (volume 1)
GENERAL
The Large Tug (LT) is not equipped for extended protection against Nuclear, Biological, or Chemical (NBC) fallout. However,
the vessel is designed to accommodate performance of the daily maintenance inspections, safety checks, and operations by
personnel dressed in MOPP IV protective clothing. All exterior components, equipment, and machinery are capable of
withstanding a raw water washdown. This washdown may be accomplished in part by the vessel's own water washdown
system. Additional washdown may be accomplished by attending vessels, shore facilities, and/or portable dewatering
pumps and hoses.
SYSTEM OPERATION
Should the vessel find itself in a contaminated area or come under NBC attack, follow the procedure below:
WARNING
After closing all weather openings and securing the ventilation, temperatures onboard the
vessel will rise rapidly, especially for personnel utilizing NBC protective procedures. Take
all appropriate measures to guard against heat related casualties until the vessel can be
decontaminated and the ventilation restored. Failure to comply can result in injury or death.
1.
Close and dog all watertight doors, hatches, portholes, and other openings to the weather.
2.
Secure all ventilation onboard the vessel.
3.
Utilize proper NBC protective procedures (i.e., MOPP IV clothing) as defined in U.S. Army Training Manual, STP21-1-
SMCT.
4.
Activate the Washdown Countermeasure (WDCM) system (WP 0071 00, volume 1).
5.
Remove the vessel from the contaminated area.
6.
Proceed at the earliest opportunity to an area where a thorough decontamination may be performed.
7.
Further guidance on NBC contamination can be found in U.S. Army regulation AR 70-71.
END OFWORK PACKAGE
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