• A D.C. powered telephone between the crew compartment and the 

 command van. 



• A sound-powered telephone between the bridge and the command van. 



e A system of emergency alarms with visual and audible indicators 

 in the bridge and command van. 



• An alarm bell at two locations in the habitat operated from the 

 command van. 



In addition, communication links were operated between the habitat and the 

 service barge anchored directly overhead. Linked to the normal television 

 system were portable cameras located in the command van and in the habitat as 

 part of a behavioral study. These two cameras proved to be of such value that 

 they continued to be used for routine communications throughout the remainder 

 of the TEKTITE program. 



Routine adjustment of communications equipment and replacement of life-limited 

 components was performed by the habitat engineer and by refurbishment crews in 

 the intervals between scientific missions. This, coupled with the redundancy 

 in modes of communications ensured that there were no significant interruptions 

 during the mission. The most common cause of minor difficulties in the inter- 

 com system was inadvertent use of selection switches or operation by personnel 

 unfamiliar with correct procedures. The alarm systems were checked routinely 

 on a periodic basis. On the several instances of electrical power failure or 

 rise in water level in the wet room trunk, the alarm system functioned 

 correctly. 



CONCLUSIONS 



It can be concluded that the habitat satisfied most performance requirements 

 and provided an excellent base for scientific saturation diving. Numerous 

 areas for design improvement were noted. However, in most cases, these desired 

 refinements are not of sufficient general interest to justify inclusion here. 

 Perhaps one of the most significant areas which requires a better solution is 

 that of material transfer techniques. Subsequent programs will do well to pay 

 close attention to the manner by which equipment is transferred from the surface. 



A suitable carbon monoxide monitoring device should be employed in subsequent 

 programs to give frequent accurate determination of carbon monoxide (CO) levels. 

 Techniques for removing and replacing bulky consumables such as baralyme and 

 charcoal can be improved. In summary, it can be stated that the technical 

 problems associated with shallow water, two gas habitats operating in benign 

 conditions similar to Lameshur Bay are easily solved. 



REFERENCES 



1. "SUMMARY REPORT ON PROJECT TEKTITE I." A multiagency 60-day saturated dive 

 conducted by the U.S. Navy, the National Aeronautics and Space Administra- 

 tion, the Department of the Interior, and the General Electric Company, 

 edited by D. C. Pauli and H. A. Cole, Office of Naval Research, ONR Report 

 DR 153S, Washington, D.C, January 16, 1970. 



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