To conduct the ocean engineering test programs properly, 

 certain dummy imits are required for use as practice or demonstration 

 items. These will be used when the real unit is not available or if un- 

 proven techniques make it wise not to risk the real items. 



The Simulated Distressed Submarine (SDS) is a mockup of the escape 

 trunk portion of a submarine hull and structure providing a portable mat- 

 ing platform for DSRV trials. The mockup includes hatches of the flush 

 and extended types. In addition the hatch arrangements will permit DSRV 

 mating exercises in various positions to simulate distressed submarine 

 roll angles up to 45° from the vertical attitude. 



The SDS is portable to enable positioning at various slopes and depths 

 to 300 ft. The hatch installed on the mockup opens into a small sealed 

 escape trunk. Most of the mockup shape is sheet metal over a 

 light skeleton, and the surfaces near the mating hatches will be steel plate 

 of sufficient strength to withstand loads imposed by the DSRV during mat- 

 ing exercises. The mockup will incorporate moxmting points for the in- 

 stallation of television and photo cameras to observe and record DSRV 

 mating exercises. 



The Dummy Hatch (false seat) will be a weighted mating hatch from 

 a submarine for use with sensor evaluation and other tests requiring only 

 a hatch. The hatch will be much lighter and more portable than the simu- 

 lated submarine mating surface and is intended for test and training appli- 

 cations to submarine collapse depth. 



The Dummy DSRV, designated Handling and Training Vehicle (HTV), 

 is an inexpensively fabricated huU that simulates the outer configuration, 

 weight, center of gravity, and moment of inertia of the DSRV. The unit 

 will be utilized to check out handling procedures, train rigging crews, 

 and practice emergency recovery procedures. 



A complete submarine hull will be available for placement at various 

 depths for salvage experiments and technical tests. This will be a sur- 

 veyed hull still capable of water-tight integrity and with operable ballast 

 tanks. In addition, some parts of submarine hulls will be provided for 

 experiments in cutting and explosive -driven devices. 



Additional instrmnentation is also ready at SCI. An electronic posi- 

 tioning system serving all of the Ocean Engineering Range operating areas 

 will be in operation soon. LORAC Mod B development of the LORAN 

 (Long Range Navigation) System, is a phase comparison, hyperbolic radio 

 location system, equipped with "Course-Medium" networks for lane 



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