The Indonesian Marine and Fishery Department has since suggested that the metal objects could instead have been instruments deployed to study the underwater sea current. A total of twelve Indonesian Navy ships were deployed in the area, including the KRI Ajak, KRI Leuser and KRI Nala. Extra underwater equipment, including a metal detector and an undersea camera, was sent from the United States, and arrived aboard the USNS Mary Sears on 17 January. The flight recorders were subsequently located elsewhere, in the waters in an area known as Majene, and a wide, sweeping search of the area revealed high amounts of scattered debris there, too. This debris was analysed to confirm it belonged to the 737. Floating debris The aircraft's right horizontal stabiliser was found by a fisherman, south of Pare Pare, about off the beach on 11 January, although it was not originally handed in, as its discoverer thought it to be a piece of plywood, only later realising it was a piece of the tail. This was confirmed by the part number on the stabiliser, 65C25746-76, which matched that of components on the missing 737. The fisherman received a reward of 50 million rupiah (equivalent to about $5,500) for his discovery. Later, other parts of the aircraft, including passenger seats, life jackets, a food tray, part of an aircraft tire, eight pieces of aluminium and fibre, an ID card, a flare and a headrest were also recovered from the area. By 13 January, a piece of a wing was also recovered. It is unclear whether the long section was a section of the right wing or the left wing, although it was examined in an attempt to discover this. The total count of recovered objects associated with aircraft, as of 29 January, was 206, of which 194 were definitely from the 737. Pieces of clothing thought to belong to passengers were also recovered, and on 15 January, pieces of human hair and what is thought to be human scalp were recovered from a headrest that had been pulled from the sea. They were DNA tested to attempt to identify them; the results of this test are, however, unknown. Cockpit voice recorder and flight data recorder On 21 January 2007, the flight data recorder (FDR) and cockpit voice recorder (CVR), popularly known as black boxes, were located 42 nautical miles off the coast of West Sulawesi by the US