Uram and Numata 



FOLLOWING SEA 



SHIP SPEED (KNOTS) 



AHEAD SEA 



Fig. Z3 - Heave double amplitude /ship diameter in 1.0 L waves 

 (hydrofoil semi -submarine) 



40 30 



FOLLOWING SEA 



SHIP SPEED (KNOTS) 



AHEAD SEA 



Fig. Z4 - Heave double amplitude /ship diameter in 2.0 L waves 

 (hydrofoil semi- submarine) 



742 



