380 ANNUAL REPORT SMITHSONIAN INSTITUTION, 19 64 



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12 JUNE 1963 



Figure 1. — Graph obtained with the deep-towed proton precession magnetometer, showing 

 an anomaly of approximately 100 gammas in the intensity of the total magnetic field. 

 This anomaly, first observed aboard the Conrad, was later confirmed by observers 

 aboard the Gillis and the Gibbs. This single clue indicates that the hull, though badly 

 torn, is still essentially in one piece. (Courtesy the Lament Geological Observatory.) 



display from a radar installation looking out at a flat angle over the 

 land. Many informative pictures were obtained with this unit, but 

 none could be positively identified with Thresher. 



TRIESTE AIDS THE SEARCH 



As additional evidence from photography, television, magnetom- 

 eters, and side-looking sonar was accumulated, it became evident that 

 the most promising region, where search should be concentrated, was 



I 



