The DOTIPOS-mounted vane shear and cone penetrometer testing 

 apparatus shows considerable potential for providing the Navy design 

 engineer with an efficient, reliable, and effective means of evaluating 

 some sediment engineering properties with which to design seafloor 

 foundations . 



FUTURE WORK 



Current plans call for the continued evaluation of the vane shear 

 and cone penetrometer apparatus and the performance of checkout tests 

 on a DOTIPOS-m.ounted piston corer, capable of obtaining a relatively 

 undisturbed sample to 10 feet in the seafloor. Seafloor tests will be 

 performed at 100- , 600- , 1200- , and 6000-foot test sites. In addition, 

 DOTIPOS with the vane shear and cone penetrometer tower and 10-foot 

 piston corer will be used for another NCEL test program to gather cores 

 and in-situ shear strength data. The cores and in-situ shear strength 

 data will be used for a detailed investigation of sample disturbance and 

 shear strength development, 



ACKNOWLEDGEMENT S 



The authors wish to acknowledge the participation of Mr. T. R. 

 Kretschmer for his efforts in the development and evaluation of DOTIPOS 

 and the vane shear and cone penetrometer device. He also provided the 

 data presented in this report. Mr. J. Padilla functioned as cruise 

 leader during sea operations and capably controlled all phases of the 

 handling of DOTIPOS. Also, Mr. P. Babineau and Mr. F. Nelson exhibited 

 high degrees of competency in the operation and maintenance of DOTIPOS. 



18 



