27. Advertisement, Ocean Industry, Oct 1969. 



28. Anon. ''Marine Trenching,'' Undersea Systems Inc. (''Gopher'' — 

 brochure) . 



29. Anon. ''Unmanned Submarine Vehicle TM-102 for Trenching Operations,'' 

 Mar 4, 1975, Tecnomance s.r.a., Venice, Italy. 



30. F. Van Daalen and J. van Steveninck. ''Shell Develops New Pipe Method,'' 

 Offshore, Aug 1970, pp 44-46, 48. 



31. F. A. Angona. ''Cavitation, A Novel Drilling Concept,'' International 

 Journal Rock Mechanics Mining Science and Geomechanical Abstracts, vol 11, 

 pp 115-119, 1974. 



32. Personal communication with Robert Elliott, NCSL, Panama City, FL. 



33. P. J. Valent and R. L. Brackett. ''A Comparison of Installation and 

 Protection Techniques for Nearshore Electrical Cables,'' CEL TN (in 

 publication) . 



34. J. van Steveninck. ''Pipeline Burial by Fluidization, ' ' 1975 Offshore 

 Technology Conference Proceedings, vol II, May 5-8, Houston, TX, pp 313- 

 314. 



35. W. C. Cooley and L. L. Clipp. ''High Pressure Water Jets for Undersea 

 Rock Excavation,'' Transactions of the ASME, Journal of Engineering for 

 Industry, 69-WA/UnT-7, May 1970, pp 281-287. 



36. Memorandum L42/H5L/aee of 21 May 1975, Subj : Recommendations on 

 Improved Cable Burial System. 



37. H. A. Baxter and R. E. Mueser. ''The Development of Ocean-Cable Plows,'' 

 IEEE Transactions on Communication Technology, vol COM-19, no. 6, Dec 1971, 

 pp 1,233-1,241. 



38. Personal communication with Homa Lee, CEL. 



39. W. J. van Heijst. ''Trenching With Water Jets,'' World Dredging and 

 Marine Construction, Sep 1969, pp 20, 21, 26. 



40. M. M. Singh, L. A. Finlayson, and N. Monney. ''Water Jetting for 

 Underwater Cable Foundations in Coral or Rock Coastal Areas,'' IIT Research 

 Institute Project Suggestion 71-1060X, Oct 29, 1971. 



41. J. M. Reynolds and A. R. F. van der Stein. ''Device Buries Pipe in 

 164 feet of Water," The Oil and Gas Journal, Nov 11, 1974. 



42. Memorandum L43/PKK/lh of 18 Jun 1975, Subj: "Alveolator" Concept 

 for Cable Burial System. 



43. M. G. Bekkar. ''Diver Work Vehicle,'' unpublished contract report 

 to NCEL, 1971. 



44. M. G. Bekkar. ''Engineering Optimization of Terrain - Vehicle 

 Systems - A Case Study of a Concept Analysis of a New Amphibean,'' 

 AC Electronics - Defense Research Laboratories, Santa Barbara, CA, 

 Feb 1969. 



48 



