Chapter 4- PREVENTIVE AND CORRECTIVE DAMAGE CONTROL 



8.120 



Figure 4-3.— Members of firefighting party cooling hatch. 



The flooding effect diagram also shows the 

 weight of salt water (in tons) required to fill 

 the compartment; this is indicated by a numeral 

 in the upper left-hand corner. In addition, the 

 transverse moment of the weight (in foot-tons) 

 about the centerline of the ship is indicated for 

 all compartments which are not symmetrical 

 about the centerline. 



Facilities for dewatering compartments con- 

 sist of the fixed drainage systems of the ship 

 and portable equipment such as electric sub- 

 mersible pumps, P-500 pumps, P-250 pumps, 

 and eductors. On a large combat ship, the 

 fixed drainage systems have a total pumping 

 capacity of about 12,200 gallons per minute- 

 less, it might be noted, than the amount of 



69 



