it has little benthic animal activity. Also, determined the 

 nature of sediments in the trench. 



f . Proved the ability of high forms of life to 

 exist at the greatest ocean depths. 



g. Obtained data on the distribution of biolumines- 

 cence throughout the water column. At depths of over 2100 

 meters, bioluminescence appears as single or small groups 

 of flashes; upon ascending to 700 meters the number of 

 flashes increases rapidly (as much as 1000 times); at 

 shallower depths bioluminescence remains high until 

 "washed out" by daylight penetration. 



h. Discovered that the submarine part of Guam 

 is a thin coral cap on a massive volcanic structure having 

 only a scattered veneer of sediments; discovered also that 

 the island arc- trench structure of which Guam is a part 

 has not subsided to any great extent. 



i. Found that the value of acceleration of gravity g 

 was 978. 9331 cm/sec^ on the bottom at 2286 meters depth, 

 in comparison with 978. 5376 cm/sec^ at the surface. 



RECOMMENDATIONS 



Provide for increasing the knowledge available to the 

 U. S, of the deep-sea environment. Specifically: 



1. Continue and extend deep-sea research with the 

 bathyscaph TRIESTE so as to take full advantage of the 

 unique and proven capabilities of this vessel. Also, modify 

 the TRIESTE to make it even more valuable for scientific 

 work than at present. 



2. Establish an enlarged scientific program, involving 

 underwater acoustics and all oceanographic disciplines, 

 for making observations and measurements vertically 

 through water columns and in very deep water. 



3. Develop improved acoustic and oceanographic 

 instrumentation for use on the TRIESTE and on fut ure deep 

 submersibles. 



4. Develop a deep submersible research craft more 

 versatile than the TRIESTE. 



5. Evaluate the usefulness of deep submersibles as 



