360 F. H. Todd 
SURFACE TANKERS ARE DESIGNED FOR A SPEED GIVEN BY 
V = . - 
Fz? (' 06 Ce) 
ee SECTION SUBMARINE TANKERS, USING OEADWEIGHT 
— DISPLACEMENT RATIOS FROM REFERENCE A. 
20,000 
20000 
O.H.P. 
{0,000 
V IN KNOTS 
Fig. 9. Comparison of surface and submarine tankers of 18,750 
tons deadweight 
