After a high-time supper by the fire... tossing sticks on the fire to keep the talk going, Jack and Ennis discussed the submarine Thresher lost two months earlier. Thresher’s remains were located on the sea floor, some 8,400 feet (2560 m) below the surface, in six major sections. The major sections are the sail (the raised tower atop a submarine's main deck), sonar dome, bow section, engineering spaces section, operations spaces section, and the tail section.