FOUR-PART BRIDLE IN 

 • OVERHEAD OF CENTER WELL 



SPECIAL BLOCK 



CENTER WELL 



CARRIAGE 



BELL MOUTH 



414-INCH NYLON LIFT LINE 

 TOALVIN 



SPECIAL PAD 



Figure 5. USNS MIZAR 's Rigging for Lift of AL VIN. 



Once ALUMINAUT had positioned herself clear of ALVIN, and had so reported, the 

 lifting of ALVIN would begin. MIZAR would haul the line in slowly until a steady force of 

 14,000 pounds was achieved; hauhng then would be stopped to allow for a gradual breakout. 

 Once breakout had occurred, ALVIN would be lifted smoothly and continuously at a fixed 

 speed of 35 feet per minute. The dynamometer would be observed at all times and loads re- 

 corded every 500 feet. Load surges would also be recorded. The lift line would be marked at 

 500-foot intervals, and at 100-foot intervals from the lower end to the first 500-foot mark. 

 The final 100 feet would be marked in 10-foot increments. 



Conditions permitting, ALVIN would be lifted steadily until the final 10-foot marker 

 was observed. At this point, the lifting would be stopped. ALVIN would then be approxi- 

 mately 50-60 feet below MIZAR. 



4. Diver Survey and Attachment of Safety Lines. A team of divers would enter the 

 water, carefully survey ALVIN, and then surface to report their findings. 



An 85-foot-long, 1-inch wire pendant, attached to a four-part bridle from the overhead 

 of MiZAR's center well, would then be lowered (figure 6). Divers would shackle the lower 



14 



