APPENDIX D. CONTINUOUS- PROFILE EQUIPMENT FOR 

 OBTAINING SUBBOTTOM REFLECTIONS 



Adrian F„ Richards 



Contained in this appendix is a tabulation of the details of and notes 

 on various continuous-profile sound source systems used for obtaining 

 subbottom reflections and, thus, delineations of the subbottom structure. 

 Included are an evaluation and recommendation for each instrument 

 system (Item 17) and one or more reference sources from which the 

 details were obtained (Item 18). Following the detailed tabulation is 

 a summary (Table D- 1 ) which enables a rapid comparison of Items 4 

 through 13 between one system and any other. Also included in this 

 table is the statement as to whether or not a particular system has 

 been used for routine surveys. The continuous-profile systems covered 

 in this appendix are (A) Substrata Acoustic Probe (Marine Sonoprobe); 

 (B) n Smith-Cummings-Meichner Apparatus"; (C) Subbottom Depth 

 Recorder (SDR); (D) Seismic Profiler; (E) Subsurex (Subsurface Ex- 

 plorer); (F) Marine Seismic System; and (G) Sonar Thumper. The 

 references cited for these systems are listed in Part E of Section X. 

 Table D- 1 also includes some data on an AN/ UQN-PDR System which 

 is mentioned in References X-6 and X-36. 



A. SUBSTRATA ACOUSTIC PROBE (MARINE SONOPROBE) 



Marine Sonoprobe is the trade mark of the Magnolia Petroleum 

 Company. This instrument was designed for resolution of thin beds 

 (one to two feet thick). A later model is used by the Naval Electronics 

 Laboratory (NEL). 



1. Model: 401 (USNHO) 



2. Manufacturer: Scientific Service Laboratories, Inc., Dallas, Texas 



3. Approximate cost new: $19,412 (1956) 



4. Maximum water depth in which operative: 



Empirically determined: 700 feet (NEL) 

 Estimated: 700 feet 



5. Maximum penetration of sediment: 



Empirically determined: 50 feet (NEL), 200 feet (Magnolia: 



record not published) 

 Estimated: 200 feet 



D-l 



