JAKARTA, Indonesia—Authorities believe they have identified the location of the two black boxes of the Sriwijaya Air jet that crashed into the Java Sea carrying 62 people. Soerjanto Tjahjono, head of Indonesia’s national transportation safety committee, on Sunday said divers were being dispatched to try to recover the cockpit-voice and flight-data recorders. Crews using helicopters, fixed-wing aircraft and search-and-rescue ships spent the day looking for and retrieving debris from the Boeing 737-500 that went down minutes after taking off from the capital, Jakarta, on Saturday afternoon. Authorities have also found human body parts and expect to use DNA testing to identify the victims, a Jakarta police spokesman said. The plane, which was on a domestic flight to Pontianak on Indonesia’s Borneo island, was delayed before it took off Saturday afternoon because of inclement weather. Shortly after it was airborne, it made an unexpected turn, flying northwest, prompting air-traffic control to ask the plane to report its direction, the transportation ministry said. Seconds later, the aircraft disappeared from the radar, at 2:40 p. m. local time.