OBJECTIVES OF SEALAB II PROJECT 5 



3. Communications were difficult because of helium-speech distortion. 



4. Sleep was often disrupted for most men by the long hours of work, high humidity, poor 

 air circulation, and physical complaints of headaches, minor ear infections, and skin rashes. 



However, in spite of the stressful aspects of the situation, the motivation and morale of 

 the men were extremely high. Group cohesiveness, as measured by the diver's choices of 

 their own team members, increased for each of the three teams from pre- to postexperiment 

 measures. Despite a general feeling of accomplishment, many men were dissatisfied with the 

 amount of work they personally accomplished. 



Fig. 2. Aquanauts open the Sealab conning tower flood valve 



Fig. 3. Sealab II begins its slow descent to the ocean bottom, 



205 ft below 



