Figure F5. Photograph showing a 600-kHz scanning sonar image displayed on the sonar screen in the dynamic-positioning (DP) room during a reentry at Site 1276. The sonar, mounted on the drill string camera frame, is at the center of the image and scans 360° around the drill pipe. The first sonar return is from the seafloor, and the outer rings are interference patterns. The far lip of the seafloor sedimentary crater above the buried reentry cone is visible at the upper left as a bright, arcuate return. The high-frequency sonar signal did not penetrate the seafloor to image the buried cone, but it was essential for identifying the sedimentary crater above the cone so that the drill pipe and camera system could be guided into visual range for hole reentry. The yellow highlights at the top center of the image are reflections from the sonar screen in the DP room.