PHOTO 90192A 



Figure C-7. Shelter for Shipboard Instrumentation. 



A new sand-dispensing apparatus was built which operates on the clamshell 

 principle (see Addendum C-6). 



It was decided to make all future sand injections directly on the ocean 

 floor, since even in shallow water sand released above the bottom spreads 

 considerably before it settles to the bottom. Treatment of the data in 

 this test indicates that the data should be manually plotted on board the 

 survey vessel as they are collected. This is not considered to be an ac- 

 curate display of data, but it will permit surveyors to change the survey 

 pattern to yield maximum information. 



POINT CONCEPTION FIELD OPERATION (DECEMBER I967) 



Purpose 



The Point Conception experiment was designed to obtain information that 

 could be used to answer the question: Does sand move around a headland 

 (Point Conception)? By making three injections and determining the trans- 

 port from one injection area to another, long-distance transport patterns 

 could be determined in a relatively short time. 



C-I7 



