TOGGLE CROSS BAR 

 WITH RELEASE 



BOOMS WITH 

 UNDERWATER LIGHTS 



ALUMINAUT 



SYNTACTIC 

 BUOYANCY 

 MATERIAL 



TOGGLE RESTING 

 ON BOOMS 



MANIPULATORS 



25-FOOT LINE WITH 

 SNAP HOOK 



Figure 16. Toggle Attachment System on ALUMINAUT. 



ALUMINAUT then began efforts to insert the toggle bar in ALVIN's hatch. She used 

 one manipulator to hold onto ALVIN (figure 17) and the other to grasp the toggle bar han- 

 dle. The toggle bar was difficult to maneuver because the syntactic material made it almost 

 positively buoyant, and the joint between the toggle bar and wire handle was unexpectedly 

 flexible. The toggle bar was nearly inserted in the sphere several times, only to float out 

 again. The toggle was finally inserted after ALUMINAUT tore away part of ALVIN's fiber- 

 glass sail with her manipulators in order to properly position the toggle. ALUMINAUT then 

 secured the tag end of the toggle line to the main lift line by attaching a snap hook to the ring 

 which supported the original toggle and stern hook. No stern hook was to be used for this 

 lift attempt. ALUMINAUT then moved above ALVIN, grabbed the lift line, and, by using 

 her vertical lift propulsion system, tugged on the line. The line held indicating that the tog- 

 gle was firmly emplaced. Next ALUMINAUT searched for 2V2 hours to locate the steel balls 

 and Stimson anchor to cut them free from the lift line. This search was unsuccessful, and 

 ALUMINAUT surfaced at 0615, 28 August, after a dive of almost 17 hours. 



28 



