354 F. H. Todd 
Table 4 
Comparison Between EHP Values for Surface Ships 
Derived from NPL Data and Series 60 
25,000 17,820 17,800 
50,000 39,360 39,200 
75,000 62,500 62,200 
100,000 87,440 87,150 
125,000 110,710 110,000 
25,000 
50,000 
75,000 
100,000 
125,000 
25,000 
50,000 
75,000 
100,000 
125,000 
* Model results extrapolated by Froude frictional coefficients, no allowance. 
t Model results extrapolated by A.T.T.C. 1947 line with an allowance ACp = +0.0004. 
