2.1.4 MONITORS AND CAMERA 



Unmodified closed-circuit fast-scan TV monitors and cameras were used. These 

 interface directly with the appropriate connectors on the Robot 400. Panasonic TN-63 

 and Sony PVJ-3030 video monitors were used on the surface and submerged platforms res- 

 pectively. During the SEACLIFF experiment a VC-1 150 video camera was installed on the 

 SEACLIFF so that live pictures could be taken and transmitted. All cameras and monitors 

 functioned reliably throughout both tests. 



2.1.5 EQUIPMENT INTERCONNECTION 



Figures 2a and 2b show the interconnection diagrams for the surface and subsurface 

 installations, respectively. All interconnections were made using existing connectors: no 

 modification of any of the equipment was necessary. Received audio was obtained through 

 the unused headphone jack on the UQC. Normal operation of the UQC was never disabled. 



Figure 3 shows the equipment used, except for the UQC. Note the scale provided by 

 the ruler below the Robot 400. 



2.2 SEACLIFF EXPERIMENT 



The first at-sea test of SUBSAT occurred on 8 and 9 December about 13 miles west of 

 Point Loma. The Navy submersible SEACLIFF and its support ship MAXINE D were sched- 

 uled to be operating in this area on a training mission and NOSC personnel received permission 

 from SUBDEVGRU ONE to conduct acoustic slow-scan tests between these vessels on a not- 

 to-interfere basis. 



SUBSAT equipment was installed on the MAXINE D bridge on 8 December 1976. 

 MAXINE D, with NOSC personnel and SEACLIFF aboard, departed North Island Naval Base 

 on 9 December 1976. Permission to install SUBSAT aboard SEACLIFF required consent 

 from Washington authorities, which was received enroute to the operating area. NOSC and 

 SEACLIFF personnel then installed the slow-scan gear aboard the SEACLIFF, completing 

 this task before arrival at the operations area. The bridge and SEACLIFF installations 

 averaged about an hour each. 



Since slow-scan transmissions were to occur on a not-to-interfere basis, no chronologi- 

 cal test plan was used. Rather a series of written procedures, reproduced here as Appendix A, 

 for transmitting slow scan, both pre-recorded and live, was devised for use by SEACLIFF 

 personnel. When the surface controller decided it was appropriate, SEACLIFF personnel 

 would transmit the desired video according to the written instructions while NOSC personnel 

 aboard the MAXINE D's bridge received, recorded, and monitored the transmissions. 



As indicated in Appendix A, procedure A merely returns the UQC to its normal func- 

 tion. Procedure B allows transmission of pre-recorded slow-scan video from the tape recorder 

 aboard SEACLIFF. This pre-recorded tape consisted of a sequence of three pictures, which 

 were repeated for the length of the tape. The three pictures were (1) gray scale (fig. 4a), 

 (2) a girl (fig. 4b), and (3) a test pattern (fig. 4c). The closed-circuit quality pictures in fig. 4 

 can be compared with the pictures shown in Section 3, which were acoustically transmitted 

 through the water. 



