RECOMMENDATIONS 



1. Continue investigation of methods of indicating bottom contact. Complete 

 the development of an electro-mechanical device, to be attached to the dynamometer 

 in the lowering equipment, to give good bottom-contact indications for water depths 

 in excess of 12,000 feet. 



2. Develop and package a camera with a wide-angle lens and larger film size 

 to be used with a 300 watt/sec flash. 



3. Investigate the use of correcting lenses and filters. 



4. Investigate the availability, cost, and use of some form of plastic rope of 

 neutral buoyancy for lowering the Type III Camera. Such a rope would also help to 

 solve the problem of bottom indication. 



5. Develop a direction control for the NEL Type III Camera to extend its use- 

 fulness in the solution of problems dealing with current direction, sources of material 

 supply, and gradients of submarine slopes. 



REFERENCES 



Following are the references cited throughout the report, and others suggested 

 as valuable sources of information in the field of underwater photography. 



1. Shumway, G., ef al. The USNEL Deep Sea Camera (Navy Electronics Laboratory, 

 Report 388) 4 January 1954. 



2. Ewing, M., ef al. "Photography of the Ocean Bottom" Optical Society of America. 

 Journal vol. 36, no. 6, June 1946, pp. 307-321. 



3. Thorndike, E. M. "Color Correcting Lens for Underwater Photography" Optical 

 Society of America. Journal vol. 45, no. 7, July 1955, pp. 584-585. 



4. "Kodak Lenses," "Shutters and Portable Lenses" (In: Kodak Data Book) 4th ed., 

 Eastman Kodak Company, 1952. 



5. "Kodak Films" (In: Kodak Data Book) 6th ed., Eastman Kodak Company, 1954. 



6. Schenck, H. V. N., Jr., and Kendall, H. W. Underwater Photography Cornell Mari- 

 time Press, 1954. 



7. "Filters and Polar Screens" (In: Kodak Data Book) Eastman Kodak Company, 1953. 



8. Thorndike, E. M. "A Wide-Angle, Underwater Camera Lens" Optical Society of 

 America. Journal vol. 40, no. 12, December 1950, pp. 823-824. 



9. "Flash Technique" (in: Kodak Data Book) Eastman Kodak Company, 1954. 



10. Shepard, F. P. and Emery, K. O. "Submarine Photography off the California Coast" 

 Journal of Geology vol. 54, no. 5, September 1946, pp. 306-321. 



11. Emery, K. O. "Submarine Photography with the Benthograph" Scientific Monthly 

 vol. 75, no. 1, July 1952, pp. 3-11. 



Cross, E. R. Underwater Photography and Television Exposition Press, 1954. 



Hahn, J. "Some Aspects of Deep Sea Underwater Photography" Photographic Society 



of America Section B, June 1950. 

 Harvey, E. N. and Baylor, E. R. "Deep Sea Photography" Journal of Marine Research 



vol.7, no. 1, 1948, pp. 10-16. 

 Kingslake, R. Lenses in Photography Case Hoyt Corporation (Garden City Books), 1951. 

 Northrop, J. "Ocean-Bottom Photographs of the Neritic and Bathyal Environment South 



of Cape Code, Massachusetts" Geological Society of Ameica. Bulletin vol. 62, no. 



12, December 1951, pp. 1381-1384. 

 Owen, D. M. "Deep Sea Underwater Photography and Some Recent Steroscopic Appli- 

 cations" P/iotogrommetr/c Engineering vol. 17, no. 1, 1951, pp. 13-19. 

 Vevers, H. G. "Photography of the Sea Floor" Marine Biological Association. Journal 



vol. 30, no. 1, June 1951, pp. 101-111. 

 Von Bonde, C, ef al. "Preliminary Experiments in Sea Floor Photography in South African 



Waters" Royal Society of South Africa. Transactions vol. 33, part 1, 1951. 



17 



