211 



this device, developed originally for the salmon tagging programs by 

 the Bureau of Commercial Fisheries in Washington State, the lobster 

 could be located and you could home in to the lobster any time of the 

 da}^ or night. He simply could not hide whether he was in a burrow or 

 at some far distance out over the plain. 



You could swim immediately to him and record what his activity 

 was at that precise moment, whether it Avas feeding, reproductive be- 

 liavior, movement or what. 



This scene show^s Conrad Mahnken working witli liis standpipe. 

 Connie was measuring productivity of the coral reef area while we 

 were down there and he was doing this by pumping quantities of ocean 

 water down through this plastic pipe into the habitat and filtering off 

 plankton and other organisms and measuring just how rich the ocean 

 area was. 



This map shows some of the scientific areas we had set aside. The 

 cross marks the habitat site, and you can see there are areas marked 

 off involving the total scientific study that were far beyond our ability 

 to swim to every day from the habitat. Not only was it beyond our 

 ability to swim to it because of distance but because of the water depth. 



We were restricted to swims of no deeper than 100 feet, and no 

 shallower than 20 feet. In the saturation method that we were in, these 

 were our upper and lower limits. 



In order to be able to move around freely and work away from the 

 habitat we used way stations. They were security items that were lo- 

 cated at some distance around the periphery of the habitat offering a 

 place of shelter in the event we had been bothered by any predator 

 organisms and had extra air tanks inside. 



Our work was very much aided by our surface scientific support 

 team. In the shallow^ areas which we could not penetrate and the 

 deeper waters and the distant areas we had a crew of three alternate 

 aquanauts and since there were no particular problems encountered 

 b}^ the original four-man crews they functioned as a surface suj)port 

 scientific team to in essence spread the scientific work out. 



They also engaged in lobster tagging techniques on the surface and 

 permitted a much wider range of the lobster studies. 



There were many things to do in the habitat, one of which was 

 maintaining a safe and low carbon dioxide level. This was done by 

 replacing old Baralyme which was used to scrub the CO2 by fresh 

 Baralyme every certain number of hours. 



Here John Van Derwalker is changing the Baralj-me in one of the 

 cannisters. 



This is, I guess, a typical meal. It looks like spaghetti and a bottle of 

 wine there, I think. 



This is exactly what it looked like on the mission. Generall}^ one 

 person would be responsible for preparing the meal and someone else 

 would do the dishes. 



Needless to say, we stayed very busy with all of these little house- 

 hold chores that we had to do 'as well as ejigineering and scientific 

 tasks. 



When we did have transfers, that is, when it was necessary to send 

 materials or items up to the surface, or materials down to us, we used 

 this large pot, and materials were put inside, the top was clamped 



