1-8 Capabilities. The three seawater supply sources are a forward seachest in void 2 starboard, a shell penetration in
void 2 starboard, and an aft seachest in void 4 port. Seachest in void 2 starboard supplies sufficient seawater to
ROWPU's for processing when barge is anchored in 15 or more feet of water. When anchored in 15 feet of water but not
less than 10 feet, starboard shell intake can supply sufficient seawater to ROWPU's for processing. At all times, when
barge is anchored or pierside, seachest in void 2 starboard can be used to supply seawater to the air conditioner and to
the chlorination unit. The seachest in void 4 port also can be used to supply seawater for cooling the diesel generators
whether the barge is anchored or pierside.
1-8.1 System capability definitions. System capability abbreviations used in this TM are defined as follows: gmp -
gallons per minute, Hg - hydrargyrum (level of mercury such as used in a pressure gauge), Hz - Hertz, kW - kilowatt, ma -
milliamperes, NPT - National Pipe Thread, ph - phase, psi - pounds per square inch, rpm - revolutions per minute, Vac -
Volts alternating current.
1-9 Special limitations. Seawater system should not be operated in sea conditions exceeding Sea State 3. ROWPU
feedwater must be kept free of chlorine, detergents, oil, and other contaminants. Water must be deep enough to ensure
sand and other foreign matter are not taken into the system with the seawater.
1-10 Performance characteristics
Cooling pump rating
22 gpm 100 ft
Seawater pump rating
350 gpm 265 ft
1-11 Equipment specifications
Pressure gauge (forward strainers)
Ernest Gage Co
3 1/2 in. diameter
15 psi./30 in. Hg.
Seachest air escape valve
Robert H. Wager Co., Inc.
2 in. nominal
William Powell Co.