Vol ume I I CConti nued) 



SCUBA Diving to Investigate In-situ Behavior of Mobile Suspended- 

 Sediment Sampler by Frederick F. Monroe 



In August 1955, CERC employed a SCUBA-equ i pped diver to collect 

 data in the Tank for Large Waves, The research involved the testing 

 of a mobile, suspended-sediment sampler. Water depth was 11.5 feet; 

 waves were 3.4 feet high; wave periods were 8 seconds and II seconds. 

 Wave action at the bottom was so strong the diver had to maintain 

 a handhold at all times. Visibility, after the passage of several 

 waves, was reduced to less than 2 inches. In spite of these diffi- 

 culties, valuable data were collected by the 'iver for the research 

 engineer. 



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