RECIFE, Brazil, June 13 (AP): The search for bodies and debris from Air France Flight 447 took on renewed urgency as experts questioned how much longer efforts would prove fruitful, even as six more bodies were pulled from the Atlantic Ocean.

Almost two weeks after the crash, Brazil's military said that June 25 has been set as a tentative date for halting efforts and that starting Monday officials will meet every two days to evaluate when to stop the search, depending on whether they are still recovering bodies or debris.

Finding the plane's flight recorders - whose locator signals begin to fade after 30 days - is key to determining how and why the Airbus A330 went down en route to Paris from Rio de Janeiro. Debris and bodies from the jet also contain crucial clues, and warm water temperature affects the length of time a body floats and remains visible to searchers.

According to the Brazilian military, the water temperature in the areas they are looking is averaging about 82 F (28 C) - warm water that speeds up the process of a body surfacing, floating and then sinking once again, said William Waldock, who teaches air crash investigation at Embry-Riddle Aeronautical University in Prescott, Arizona.

In water temperatures like those in the search area, he said, an intact body could likely float for two or three weeks - Air France Flight 447 went down May 31 with 228 on board. Those warm waters also mean there is a lot of marine life in the area and "they'll break a body down faster," Waldock said.

Meanwhile, military ships and planes continued to struggle in worsening weather looking for more bodies and debris.