Preliminary tests were also carried out on two dead- 

 men jetted into the bottom in 60 feet of water adjacent to 

 the vertical array. A vertical strain was taken by a winch 

 aboard a modified landing craft (LCU 45) and the dynamom- 

 eter was once again placed in the system to measure the 

 force necessary to pull the deadmen from the sediment. 

 Because of surface wave action it was difficult to maintain 

 a steady strain, and the deadmen were worked back and forth 

 in the bottom. The force required to wrench each deadman 

 from the bottom was approximately 2250 pounds. During 

 most of this operation, the ship was anchored to these 

 pipes. Since this vessel was in excess of 100 tons, it has 

 been speculated that larger, more sophisticated deadmen 

 could be used for permanent moorings for large vessels. 



Further tests are planned using more powerful pumps 

 to facilitate deeper penetration of the deadmen and greatly 

 increase their anchoring capabilities. Also under considera- 

 tion is the use of high-pressure air as the power source. 

 If feasible, this would eliminate the water pump, hose, sig- 

 nal line, and also the tedious task of mooring the support 

 vessel over the work area. 



24 



