ct-. r DB/KYD 



ck, (% SAT.) 



I 100 ' % SATURATION 



Figure 16. Excess attenuation coeffi- 

 cent for mode 1-1-1 vs. per cent of 

 saturation with oxygen, based on meas- 

 urements with sea water. 



QC..DB/KYD 



Og, (GONYAULAX) 

 MODE l-l-l 



20 30 



300 NUMBER/ML 



Figure 17. Excess attenuation coeffi- 

 cient for mode 1-1-1 vs. concentration 

 of Gonyaulax expressed as number per 



milliliter. 



77 



