Dern 





Type 1 and 1 5 buoy 

 (approximate shape) 



Type 12 buoy 

 (exact shape) 



For the type 12 buoy the exact expression of S (z) is 



S (z) = S (o) 



z+hj 



1 + TT^ >(t - - V 



. 1 (z + h 2 ) 



For type 11 or 14 



S (z) = S (o) 1 (z + h ) 



where h is very large . 

 As an example , for type 1 



h = 0,42 m 



1034 



