Unstable Motion of Free Spar Buoys in F~ is 



11 H v (meters) 



See key below this figure 



+ 



+ 



+ 



rb 



Theoretical curve 



TV (sec.) 



FIGURE 37- REGION OF ROLLING OF TYPE 15 BUOY 



KEY FOR FIGURES 35 TO 37 



Experiments 



_i_ frequent and important rolling ( yJ >10°) 



£| frequent but not important rolling ( *>? /10°) 



u^ no frequent but important rolling ( \fl N 10') 



/tj no rolling 



1071 



