Fingers 



Radioisotope power device and batteries 



Lights and visual beacons 



Sonar beacons 



Oceanographic instruments 



Antifouling devices 



Guide lines 



LOBSTER 



The experiments are outlined under the following technological work 

 "breakdowns established by the 1968 issue of the DOT TDP.^ 



I. Site Selection Subsystem (WBS 2.1100) 



A. Instruments (WBS 3.1110) 



1. Sediment Properties . A comprehensive sediment sampling 

 and testing program will be performed on the soils of the 

 proposed SEACON sites. The results of these experiments 

 and tests will be used to select the most suitable site 

 for SEACON and provide design data on the chosen site in 

 support of other SEACON experiments. 



Shallow coring using hydroplastic or Ewing gravity 

 corers will be performed at the proposed sites. The 

 DOTIPOS mounted corer will also be used to obtain 10-foot 

 long samples. A complete series of laboratory tests will 

 be performed on these cores. The various corer systems 

 will be evaluated for use in site surveys for structural 

 systems of the kind required for SEACON. 



In addition to coring and laboratory testing, various 

 types of in-place tests will be performed. In-situ plate 

 bearing tests will be run in order to determine the allow- 

 able bearing capacity for the spread footings used in 

 SEACON. In-situ vane shear and cone penetrometer tests 

 will be performed to a depth of 10 feet into the sediment 

 at the sites, using DOTIPOS as the support platform. This 

 information will be evaluated with relation to the com- 

 parable data obtained from cores. Also, interrelationships 

 between the various types of in-situ test results will be 

 examined. An in-situ test of the long-term behavior of 

 sediments using the LOBSTER system will be performed at 

 the selected SEACON site. 



2. Oceanographic Properties . Information on the oceanographic 

 properties is required for choosing a suitable site, de- 

 signing many of the SEACON experiments and for interpreting 



183 



