OPERATION II 



TURBIDITY 



A similar time-space graph of light transmission 

 for Operation II is presented in figure 21. The light trans- 

 mission ranged from 36 to 73 percent. The areas of great- 

 est turbidity, with 50-percent light transmission or less, 

 were present from near the sea floor to the surface around 

 high tide between 1200 and 1700. This broad zone then 

 narrowed. From 0400 through the remainder of the opera- 

 tion, the most turbid areas were confined to a relatively 

 thin mid-water layer. 



1000 1400 1800 2200 0200 



TIME (HOURS) 



0600 



1000 



Figure 21. Water transparency (percent transmission). Operation II. 



40 



