identification. The system operates with a geographical accuracy ranging 

 from ±15 ft near the base lines to approximately ±400 ft at the maximum 

 range of 300 nautical miles. The repeatability of the system is reliable; 

 that is, the user may relocate a previously used position with accuracy 

 better than that stated above for geographical accuracy. 



SCI and the primary Ocean Engineering Range areas are within the 

 plot of the theoretical 25 ft accuracy, i.e. , the geographical accuracy of 

 position determination in the area east of SCI averages 15- to 20-ft (Fig. 1). 



The Cable-controlled Underwater Research Vehicle (CURV) is an im- 

 manned, tethered vehicle developed to locate and recover expended tor- 

 pedoes from depths to 2,500 ft (Fig. 4). This vehicle has an acoustic lo- 

 cation system, active and passive sonar, underwater television, photo- 

 graphic cameras with lights, and a hydraulic claw. This vehicle has also 

 proved to be valuable as an underwater inspection tool, site survey instru- 

 ment, and sensor test bed. As evidenced at Palomares, Spain, it can be 

 "jury-rigged" to go deeper and to perform additional tasks such as 

 recovering stray nuclear weapons. CURV HI has a capability of operating 

 at depths of 7, 000 ft and is scheduled to be operational on the 

 Ocean Engineering Range by the end of 1969. 



Most of the DSSP test activities will be conducted in either of 

 two test areas within the COMNUC Range. The greater number of 

 operations will be executed along the northeastern shore of the Island. 

 Depths vary from shoreline shallows with a smooth hard-sand bottom, to 

 4,000 ft and soft sedimentary bottom at the seaward edge of the area. 

 This area will have a bottom- mounted, two-dimensional underwater posi- 

 tioning system, navigational transponders, and miscellaneous objects in 

 known locations to check the accuracies of vehicle sensors. All under- 

 water television, photometric equipment, and other instrumentation are 

 to be portable installations to ensure maximum range versatility. The 

 area will also contain a submarine hull and smaller salvageable objects 

 for the Large Object Salvage System (LOSS) tests and evaluation, a com- 

 plex to accommodate Man- In- The- Sea (MITS, principally SEALAB) ex- 

 periments, and the Poseidon test complex. Most remaining test needs 

 can be fulfilled by another area, a noninstrumented region to the west of 

 the Island. 



Testing of four major systems development programs (MITS, 

 LOSS, DSRV, and DSSV) at the Ocean Engineering Range began 

 in 1968 and will extend well into the 1970 's. Each program 

 will be able to contribute additional support for one or more of the other 

 programs. In this way, through coordination, cooperation, and joint use 



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