SPEED-LENGTH RATIO (V/V ) 
Semisubmerged Ships 
PAAR A AT 
ZONE OF SEVERE 
MOTIONS AND WET - 
DECKS IN IRREGULAR 
STORM SEAS 
26 Saas 
eR RAY 
ZONE OF MODERATE 
MOTIONS AND DRY 
DECKS IN IRREGULAR 
STORM SEAS 
2.0 
0.8 
0.6 
0.4 
WAVE LENGTH 
SHIP LENGTH 
0.2 
PERIOD-LENGTH RATIO (T/ //— ) 
Fig. 3. Theoretical speed-length ratios for synchronous oscillation 
in regular-head seas of different lengths (from Ref. 5) 
0.4 
0.3 
FROUDE NUMBER (V/ / ) 
531 
