submarine on the surface at a distance of three (3) to ten (10) miles. (2) RABY (DE 698) was in radar renge of the estimated position of the reported submarine but made no radar contact 3 RABY and one plane made a radar and sonar (by DE) sweep of the area all night with negative results. (3) After an interview with the guard reporting the sighting it is considered doubtful that the reported sighting was a submarine; it is quite possible that the guard sighted RABY hull dowm on the horizon and mistook it for a submarine. Ceo (4) The evaluation of the reported sighting is "DOUBTFUL." (1) At 2023 Mike 24 February 1948, RABY (DE 698) picked up a sound contact at a position 17 miles, bearing 097°T from the center of ENIWETOK Atoll. SPANGLER (DE 696) was dispatched to the position of the reported contact and picked up the contact at 2253 Mike and held the contact for 3 minutes. RABY held the contact until 0943 on 25 February, at which time the scund contact was lost. (2) Entire contact was by sonar; some propeller noises were heard. Section VII From characteristics of the sonar con- 50

Select target paragraph3