Jeff Dudas - December 6, 2005 00:00 EST

The discovery of two large pieces of the Titanic's hull on the ocean floor indicates that the fabled luxury liner sank faster than previously thought, researchers said Monday.

After the bottom section of the hull broke free, the bow and stern split, said Roger Long, a naval architect who analyzed the find. The stern, which was still buoyant and filled with survivors, likely plunged toward the ocean floor about five minutes later.

Previous researchers believed the ship broke in just two major pieces, the bow and stern, which was how the sinking was depicted in the 1997 film version of the catastrophe. David Brown, a Titanic historian, estimated before the latest find that the stern took 20 minutes to slide into the water.

The newly found hull sections, located about a third of a mile from the stern of the wreck, were examined during an expedition in August sponsored by The History Channel. On Monday, Titanic experts met at Woods Hole Oceanographic Institution to discuss their analysis of the find for a documentary to be aired on the cable channel on Feb. 26.

"The breakup and sinking of the Titanic has never been accurately depicted," said Parks Stephenson, a Titanic historian who took part in Monday's conference.

Explorer Robert Ballard found the bulk of the wreck in 1985, at a depth of 13,000 feet and about 380 miles southeast of Newfoundland. Ballard was not impressed with the expedition's find.