Uram and Numata 



20 30 



SHIP SPEED, KNOTS 



Fig. 12 - Effective horsepower comparison regular 

 Z.O L waves 



above 35 knots, while the Large Bulb Ship generally has an advantage at speeds 

 up to 35 knots. 



MOTIONS BEHAVIOR 



Professor Mandel's calculations [9] on the critical speed zones of operation 

 for various sea states having a Neumann spectra are reproduced, in part, in 



730 



