D, DRAG IN POUNDS 
1200 
1000 
800 
600 
400 
200 
Deep-Diving Submarine Hydrodynamics 
NOTE: CURVES OF CONSTANT SHP ARE 
DISCONTINUOUS BETWEEN HORIZONTAL 
AND VERTICAL MOTION, BECAUSE OF 
LARGE DIFFERENCE IN HULL INTERFERENCE 
BETWEEN THESE TWO CONDITIONS 
SHIP SPEED, KNOTS 
Fig. 13. Resistance and power, ship and shaft 
331 
