A new S/A device was placed in the anchor, and it was placed back 

 on the seafloor. The anchor was fired and test-pulled satisfactorily. 



There was sufficient time to install another anchor that day, but 

 the process of getting the YC barge into its STATO mooring was too time 

 consuming, and the firing was delayed until the following morning. 

 Because of this problem, it was decided to use the LCM8 to position the 

 YC barge over the drop point for a new mooring leg and then to use the 

 first installed anchor to hold the barge for the second firing. This 

 procedure worked very well, and greatly sped up the operation. 



INSTALLATION P3, P4 



Both firings produced almost identical results. Gun barrel pressure, 

 penetration and piston retrieval load were similar. Both firings occurred 

 on one day and each anchor took about 2 to 2-1/2 hours to assemble and 

 deploy. 



INSTALLATION P5 



The anchor was placed on the seafloor, and it could not be fired 

 because of an open circuit on one side of the firing cable (this is 

 easily detected because the resistance through the firing cable and 

 solenoid valves in the S/A device is accurately known). Line resistance 

 was about 200 ohms compared to the correct resistance of 70-80 ohms, 

 indicating a correct electrical connection to only one solenoid; thus 

 the system could not fire with the existing (safe, 36-volt) power supply. 

 The anchor was immediately brought on deck; misfire procedures were 

 unnecessary in this case, and the wire was replaced. The problem was 

 simply a dirty connector. Standard procedure had been to check the line 

 resistance at several stages during assembly and overbearing, but this 

 problem did not occur until the anchor was in the water. The wire was 

 replaced and the anchor was quickly fired and test-pulled. 



INSTALLATION P6, P7 



Both anchors were installed without incident. One notable point 

 was that the piston retrieval load for P7 was 100-110 kips. The piston 

 alone in this case would have provided sufficient resistance to serve as 

 the primary mooring anchor. Gun barrel pressures for both firings, each 

 using 12 pounds (5.4 kg) of M26 were identical, 27 ksi (186 MPa) . These 

 pressures were consistently higher than originally predicted, but their 

 excellent repeatability allowed slight field changes to obtain desired 

 field performance. 



27 



