APPENDIX B - TEST PLAN FOR SUBSAT DOLPHIN OPS - 19 JAN 1976 



1. PURPOSE - The purpose of this test is to investigate what conditions if any, 

 are suitable for transmitting slow-scan video over a standard UQC from a submerged platform 

 to a near-surface transducer. Transducer depth, d, transducer baffling, and horizontal offset 

 will be varied to ascertain what conditions are necessary for good video quality. 



2. EQUIPMENT — Video will be transmitted by the submerged platform 

 (DOLPHIN) and received by the surface support craft (BOX-L). NUC Code 65 1 1 will provide 

 and interconnect its equipment to the UQC's aboard DOLPHIN and BOX-L. Each installa- 

 tion weighs approximately 35 lb, occupies 2 cu ft and draws 0.7 A of 1 15 VAC. NUC Code 

 2563 is requested to provide aboard BOX-L: (1) UQC with TIPE option, (2) UQC compatible 

 transducer with removable baffle capable of being deployed at either 20 ft or 200 ft, (3) a 

 secondary method (besides UQC TIPE) for allowing DOLPHIN to ascertain slant range to 

 BOX-L, and (4) a method for allowing DOLPHIN to obtain bearing of BOX-L. 



3. MEASUREMENT RUNS (See fig. B-l) — Each measurement run will take place 

 with DOLPHIN at one-half test depth. For each run DOLPHIN will start at a horizontal 

 range somewhat in excess of 2000 ft. It will obtain bearing to BOX-L and come about to 

 heading so as to pass vertically beneath BOX-L. It will then proceed at 2 kt on this heading 

 until it has completed sending five video transmissions. Video transmissions will be initiated 

 at horizontal ranges of 2000 ft, 1000 ft, minimum range, 1000 ft and 2000 ft. As each of 

 these points is passed, the video operator will announce over UQC the run and horizontal 

 range. BOX-L and DOLPHIN will then terminate any acoustic transmissions. BOX-L will 

 then signal Morse "R" (short-long-short). Upon receipt of "R" video operator aboard 

 DOLPHIN will transmit approximately 1 minute and 20 seconds of video (three repetitions 

 of three slow-scan frames) from video cassette. DOLPHIN operator will signal BOX-L by 

 UQC voice at end of transmission. BOX-L will acknowledge and resume transmitting 

 ranging information while DOLPHIN continues on to next transmission point. At the end of 

 each run DOLPHIN will come about, hover, and wait for BOX-L to announce COMEX of 

 run. After announcing COMEX of next run, BOX-L will initiate short noise-source trans- 

 mission so that DOLPHIN can come to exact heading for this run, after which DOLPHIN 

 commences run. The runs are: 



ALPHA: Transducer hung 200 ft below BOX-L with baffle. 



BRAVO: Transducer hung 20 ft below BOX-L with baffle. 



CHARLIE: Transducer hung 20 ft below BOX-L w/o baffle. 



DELTA: Transducer hung 200 ft below BOX-L w/o baffle. 



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